fix: support --json flag for heartbeat 7.13

[vigneshshanmugam]

• fix Journeys not being called #332
• --json flag was removed unintentionally in this PR 8ec94c9, so we bring that flag back which is still used by heartbeat 7.13.

[apmmachine]

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Build stats

• Build Cause: Pull request #333 opened

• Start Time: 2021-07-01T03:31:39.744+0000

• Duration: 28 min 34 sec

• Commit: c7fc40b

Test stats 🧪

Test	Results
Failed	0
Passed	113
Skipped	0
Total	113

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Log output

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[2021-07-01T03:41:34.239Z]  > git checkout -f 811e48cf923519952b6454bf330b429cd766355b # timeout=15
[2021-07-01T03:41:37.792Z] Commit message: "Merge commit '08fb67fa7295398f3b95b3ed8f6347b0931636a8' into HEAD"
[2021-07-01T03:41:37.792Z] First time build. Skipping changelog.
[2021-07-01T03:41:37.792Z] Cleaning workspace
[2021-07-01T03:41:37.854Z]  > git --version # timeout=10
[2021-07-01T03:41:37.863Z]  > git --version # 'git version 2.17.1'
[2021-07-01T03:41:37.873Z] fatal: bad object f9f89c7688f920e3ef655b7e4e87fec857123e29
[2021-07-01T03:41:37.794Z]  > git rev-parse --verify HEAD # timeout=10
[2021-07-01T03:41:37.798Z] Resetting working tree
[2021-07-01T03:41:37.798Z]  > git reset --hard # timeout=10
[2021-07-01T03:41:37.819Z]  > git clean -fdx # timeout=10
[2021-07-01T03:41:39.861Z] Running in /var/lib/jenkins/workspace/nt-rum_elastic-synthetics_PR-333/src/github.com/elastic/synthetics
[2021-07-01T03:41:54.218Z] + set +x
[2021-07-01T03:41:54.219Z] => Downloading nvm from git to '/var/lib/jenkins/workspace/nt-rum_elastic-synthetics_PR-333/.nvm'
[2021-07-01T03:41:54.219Z] 
=> Initialized empty Git repository in /var/lib/jenkins/workspace/nt-rum_elastic-synthetics_PR-333/.nvm/.git/
[2021-07-01T03:41:54.788Z] From https://github.com/nvm-sh/nvm
[2021-07-01T03:41:54.788Z]  * [new tag]         v0.37.1    -> v0.37.1
[2021-07-01T03:41:54.788Z] => Compressing and cleaning up git repository
[2021-07-01T03:41:54.788Z] 
[2021-07-01T03:41:54.788Z] => Profile not found. Tried ~/.bashrc, ~/.bash_profile, ~/.zshrc, and ~/.profile.
[2021-07-01T03:41:54.788Z] => Create one of them and run this script again
[2021-07-01T03:41:54.788Z]    OR
[2021-07-01T03:41:54.788Z] => Append the following lines to the correct file yourself:
[2021-07-01T03:41:54.788Z] 
[2021-07-01T03:41:54.788Z] export NVM_DIR="$HOME/.nvm"
[2021-07-01T03:41:54.788Z] [ -s "$NVM_DIR/nvm.sh" ] && \. "$NVM_DIR/nvm.sh"  # This loads nvm
[2021-07-01T03:41:54.788Z] 
[2021-07-01T03:41:56.695Z] => Close and reopen your terminal to start using nvm or run the following to use it now:
[2021-07-01T03:41:56.695Z] 
[2021-07-01T03:41:56.695Z] export NVM_DIR="$HOME/.nvm"
[2021-07-01T03:41:56.695Z] [ -s "$NVM_DIR/nvm.sh" ] && \. "$NVM_DIR/nvm.sh"  # This loads nvm
[2021-07-01T03:41:56.695Z] Found '/var/lib/jenkins/workspace/nt-rum_elastic-synthetics_PR-333/src/github.com/elastic/synthetics/.nvmrc' with version <12.18.4>
[2021-07-01T03:41:56.955Z] v12.18.4 is already installed.
[2021-07-01T03:41:57.215Z] Now using node v12.18.4 (npm v6.14.6)
[2021-07-01T03:41:57.215Z] /var/lib/jenkins/workspace/nt-rum_elastic-synthetics_PR-333
[2021-07-01T03:41:57.332Z] Running in /var/lib/jenkins/workspace/nt-rum_elastic-synthetics_PR-333/src/github.com/elastic/synthetics
[2021-07-01T03:41:57.647Z] + chmod -R ugo+rw examples
[2021-07-01T03:41:57.676Z] Running in /var/lib/jenkins/workspace/nt-rum_elastic-synthetics_PR-333/src/github.com/elastic/synthetics/__tests__/e2e
[2021-07-01T03:41:57.993Z] + npm run test
[2021-07-01T03:41:57.993Z] 
[2021-07-01T03:41:57.993Z] > e2e-synthetics@ test /var/lib/jenkins/workspace/nt-rum_elastic-synthetics_PR-333/src/github.com/elastic/synthetics/__tests__/e2e
[2021-07-01T03:41:57.993Z] > npm i && npm run setup &&  bash scripts/test.sh
[2021-07-01T03:41:57.993Z] 
[2021-07-01T03:42:01.292Z] added 3 packages from 4 contributors and audited 178 packages in 2.553s
[2021-07-01T03:42:03.827Z] 
[2021-07-01T03:42:03.827Z] 68 packages are looking for funding
[2021-07-01T03:42:03.827Z]   run `npm fund` for details
[2021-07-01T03:42:03.827Z] 
[2021-07-01T03:42:03.827Z] found 0 vulnerabilities
[2021-07-01T03:42:03.827Z] 
[2021-07-01T03:42:03.827Z] 
[2021-07-01T03:42:03.827Z] > e2e-synthetics@ setup /var/lib/jenkins/workspace/nt-rum_elastic-synthetics_PR-333/src/github.com/elastic/synthetics/__tests__/e2e
[2021-07-01T03:42:03.827Z] > bash scripts/setup.sh
[2021-07-01T03:42:03.827Z] 
[2021-07-01T03:42:03.827Z] 
[2021-07-01T03:42:03.827Z] Temporary folder
[2021-07-01T03:42:03.827Z] Temporary files will be stored in: ./tmp
[2021-07-01T03:42:03.827Z] 
[2021-07-01T03:42:03.827Z] Starting elasticsearch , kibana and synthetics docker
[2021-07-01T03:42:03.827Z] 
[2021-07-01T03:42:03.827Z] 
[2021-07-01T03:42:03.827Z] Waiting for synthetics docker to start...
[2021-07-01T03:42:03.827Z] Error: No such object: synthetics
[2021-07-01T03:42:16.046Z] Error: No such object: synthetics
[2021-07-01T03:42:24.169Z] Error: No such object: synthetics
[2021-07-01T03:42:34.144Z] Error: No such object: synthetics
[2021-07-01T03:42:44.123Z] Error: No such object: synthetics
[2021-07-01T03:42:56.336Z] Error: No such object: synthetics
[2021-07-01T03:43:06.316Z] ✅ Setup completed successfully. Running e2e tests...
[2021-07-01T03:43:06.584Z] Waiting for Elastic Search  to start
[2021-07-01T03:44:03.020Z] Waiting for Synthetics to send data to ES for test monitor
[2021-07-01T03:58:58.174Z] Cancelling nested steps due to timeout
[2021-07-01T03:58:58.186Z] Sending interrupt signal to process
[2021-07-01T03:59:10.460Z] scripts/test.sh: line 26:  4741 Terminated              SYNTHETICS_JUNIT_FILE='junit.xml' npx @elastic/synthetics uptime.journey.ts --reporter junit
[2021-07-01T03:59:10.460Z] npm ERR! code ELIFECYCLE
[2021-07-01T03:59:10.460Z] npm ERR! errno 143
[2021-07-01T03:59:10.460Z] npm ERR! e2e-synthetics@ test: `npm i && npm run setup &&  bash scripts/test.sh`
[2021-07-01T03:59:10.460Z] npm ERR! Exit status 143
[2021-07-01T03:59:10.460Z] npm ERR! 
[2021-07-01T03:59:10.460Z] npm ERR! Failed at the e2e-synthetics@ test script.
[2021-07-01T03:59:10.460Z] npm ERR! This is probably not a problem with npm. There is likely additional logging output above.
[2021-07-01T03:59:10.460Z] 
[2021-07-01T03:59:10.460Z] npm ERR! A complete log of this run can be found in:
[2021-07-01T03:59:10.460Z] npm ERR!     /var/lib/jenkins/workspace/nt-rum_elastic-synthetics_PR-333/.npm/_logs/2021-07-01T03_58_58_338Z-debug.log
[2021-07-01T03:59:10.467Z] script returned exit code 143
[2021-07-01T03:59:11.695Z] Post stage
[2021-07-01T03:59:11.732Z] Archiving artifacts
[2021-07-01T03:59:11.901Z] Recording test results
[2021-07-01T03:59:12.034Z] None of the test reports contained any result
[2021-07-01T03:59:12.044Z] [Checks API] No suitable checks publisher found.
[2021-07-01T03:59:12.306Z] Stage "Release" skipped due to earlier failure(s)
[2021-07-01T03:59:12.346Z] Stage "Release" skipped due to earlier failure(s)
[2021-07-01T03:59:12.429Z] Stage "Release" skipped due to earlier failure(s)
[2021-07-01T03:59:13.103Z] Running on Jenkins in /var/lib/jenkins/workspace/nt-rum_elastic-synthetics_PR-333
[2021-07-01T03:59:13.189Z] [INFO] getVaultSecret: Getting secrets
[2021-07-01T03:59:13.241Z] Masking supported pattern matches of $VAULT_ADDR or $VAULT_ROLE_ID or $VAULT_SECRET_ID
[2021-07-01T03:59:14.208Z] + chmod 755 generate-build-data.sh
[2021-07-01T03:59:14.209Z] + ./generate-build-data.sh https://apm-ci.elastic.co/blue/rest/organizations/jenkins/pipelines/apm-agent-rum/elastic-synthetics/PR-333/ https://apm-ci.elastic.co/blue/rest/organizations/jenkins/pipelines/apm-agent-rum/elastic-synthetics/PR-333/runs/1 ABORTED 1654193
[2021-07-01T03:59:14.209Z] INFO: curl https://apm-ci.elastic.co/blue/rest/organizations/jenkins/pipelines/apm-agent-rum/elastic-synthetics/PR-333/runs/1/steps/?limit=10000 -o steps-info.json
[2021-07-01T03:59:14.209Z] INFO: curl https://apm-ci.elastic.co/blue/rest/organizations/jenkins/pipelines/apm-agent-rum/elastic-synthetics/PR-333/runs/1/tests/?status=FAILED -o tests-errors.json