Adding snapshot link to graylog with every call to screenshots

[pcrespov]

What do these changes do?

After the informative presentation by @odeimaiz about end-to-end testing, I felt that during the testing there was little information about the backend state. Then, I thought it might be good to have a way to get a direct link to the backend logs at a give time.

This implements a simple utility function to build links to graylog with a given time spam. Then, this function is used to build a log message next to every call to screenshot that will allow the tester to analyze the backend state corresponding to every front-end screenshot

Added some extra doc.

Related issue number

How to test

Following the instructions of the presentation, we can run a tutorial and see the Backend Snapshot: ... link next to the screenshot

$ cd tests/e2e
$ npm install --save
$ node tutorials/sleepers.js https://osparc-master.speag.com/ puppeteer@itis.testing ******* 
[2020-12-03T09:16:36.020Z] Screenshots directory: /home/crespo/devp/osparc-simcore/tests/e2e/screenshots/
[2020-12-03T09:16:36.257Z] Opening https://osparc-master.speag.com/
[2020-12-03T09:16:36.899Z] Backend Snapshot:  https://monitoring.osparc-master.speag.com/graylog/search?q=image_name%3Aitisfoundation%2A&rangetype=absolute&from=2020-12-03T09%3A16%3A06.899Z&to=2020-12-03T09%3A16%3A36.899Z
[2020-12-03T09:16:36.900Z] /home/crespo/devp/osparc-simcore/tests/e2e/screenshots/10-16-36_Sleepers_landingPage_osparc-master.speag.com.jpg
...

Checklist

• Did you change any service's API? Then make sure to bundle document and upgrade version (make openapi-specs, git commit ... and then make version-*)
• Unit tests for the changes exist
• Runs in the swarm
• Documentation reflects the changes
• New module? Add your github username to .github/CODEOWNERS

[codecov]

Codecov Report

Merging #2015 (1ff0e1d) into master (d3830fc) will increase coverage by 3.2%.
The diff coverage is n/a.

@@           Coverage Diff            @@
##           master   #2015     +/-   ##
========================================
+ Coverage    70.4%   73.7%   +3.2%     
========================================
  Files         390     390             
  Lines       14346   14346             
  Branches     1441    1441             
========================================
+ Hits        10109   10579    +470     
+ Misses       3885    3382    -503     
- Partials      352     385     +33     

Flag	Coverage Δ
integrationtests	63.1% <ø> (-13.0%)	⬇️
unittests	67.7% <ø> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
...re_service_webserver/projects/projects_handlers.py	89.8% <0.0%> (+0.3%)	⬆️
.../simcore_service_webserver/projects/projects_db.py	84.4% <0.0%> (+1.9%)	⬆️
...server/src/simcore_service_webserver/groups_api.py	89.3% <0.0%> (+2.5%)	⬆️
.../server/src/simcore_service_webserver/users_api.py	93.9% <0.0%> (+2.6%)	⬆️
...r/src/simcore_service_webserver/director/config.py	93.1% <0.0%> (+3.4%)	⬆️
...er/src/simcore_service_webserver/catalog_config.py	100.0% <0.0%> (+4.0%)	⬆️
...es/sidecar/src/simcore_service_sidecar/rabbitmq.py	89.7% <0.0%> (+4.4%)	⬆️
...eb/server/src/simcore_service_webserver/catalog.py	76.0% <0.0%> (+5.3%)	⬆️
...erver/src/simcore_service_webserver/director_v2.py	85.8% <0.0%> (+6.1%)	⬆️
.../sidecar/src/simcore_service_sidecar/log_parser.py	81.8% <0.0%> (+16.8%)	⬆️
... and 15 more

[GitHK]

thanks for this!

[ignapas]

Nice :) only a couple of comments... and that annoying linter of yours!