feature: ingtegration test coverage

[hsinn0]

• Added a task to get the report.

[hsinn0]

When running the new Gradle task as described in the build.gradle, I get:

\> Task :cloudfoundry-identity-uaa:jacocoLogIntegrationTestCoverage
Test Coverage:
    - Class Coverage: 13%
    - Method Coverage: 14.4%
    - Branch Coverage: 3.7%
    - Line Coverage: 8.6%
    - Instruction Coverage: 6.9%
    - Complexity Coverage: 8.4%

\> Task :jacocoLogAggregatedCoverage
Test Coverage:
    - Class Coverage: 14%
    - Method Coverage: 15.2%
    - Branch Coverage: 4%
    - Line Coverage: 9.3%
    - Instruction Coverage: 7.5%
    - Complexity Coverage: 9%

You can also get the coverage number from IntelliJ Idea by running integrationTest gradle task there with Run with Coverage option there. In my case, the numbers from Idea was slightly different from the gradle task result above, but close enough. There is an option to run integrationTest task with Coverage in IntelliJ Idea. However, the coverage report from it was not what we expected. It was not showing coverage for the app server code path that was being executed.

[hsinn0]

This is not working. The JaCoCo coverage data is collected not from app server but from the integration test process itself. Looking at our integrationTest definition, it should have been somewhat obvious but I missed that. Will have to change to instrument cargo.local process instead.