SONAR-5672 Fix graph test
Remove temporary infinite timeout on upload_report now it's back to be asynchronous
fix views plugin large tests failing

it was linked to asynchronous switch in the compute engine. Views datacleaner (batch side) could be launched before than the snapshot switch happened on the server side. It's a temporary hack waiting for next views plugin release (which won't call the PurgeTask#purge(...) method anymore)
Improve Issues Injection test
Add counter on issues performance tests
Computation: propagate the same session object everywhere
  to avoid DB lock (avoid nested session)
Fix test
fix quality flaws and refactorings
SONAR-5712 Re-merge package_design widget into file_design
Fix quality flaws
SONAR-5666 Remove useless {:} in ES search query
improve code coverage of DataCleaner classes
Add periodic rate when inserting issues in E/S
SONAR-5826 Migrate sources and SCM data to file_sources