[#818] Integration tests added to CI

[tinamthomas]

Description of Change

Issue #818 changes

1. assertionTimeout and selectorTimeout set to 5 seconds instead of default 3 seconds
2. added step in CI to run integration tests (With ContinueOnError = true, so that we can monitor tests to ensure they pass consistently without disrupting development effort. Then we can remove this flag.

Issue #832 changes: Local hanging issue resolved based on discussion here jeffbski/wait-on#116

Issue #959 changes: Needed mock data to be returned in the emissions API, using TEST_MODE flag to know if mocking is needed

Checklist

• PR description included and stakeholders cc'd
• tests are changed or added
• yarn test passes
• yarn lint has been run
• git pre-commit hook is successfully executed.
  (Please refrain from using --no-verify)
• yarn changeset was run and relevant packages have been updated as a major/minor/patch bump with descriptions
  (Determine version update using Semantic Versioning)
• relevant documentation is changed or added

Notes

• Issues covered in this PR:
  Integrate E2E tests into CI/CD pipeline #818
  Intermittent test hang when running e2e integration tests locally #832
  Fix recommendations page in integration tests #959
• Separately have created an issue to enhance the integration-tests to not use the TEST_MODE flag:
  Fix recommendations page in integration tests #959

© 2021 Thoughtworks, Inc.

[camcash17]

Please take a look at Issue #959 before completing this PR

[tinamthomas]

Absolutely @camcash17. Was going to look into it, but ran into this issue and wanted to address that first. #832

[4upz]

Looks good and passes on my machine! Thanks for working on this! 🥳