In ".gitlab-ci.yml", adapted path to coverage reports.

8 jobs for java_migration in 1 minute and 57 seconds (queued for 2 seconds)
Name Stage Failure
run_unit_tests_on_windows Unit Test
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1]
[ERROR] After correcting the problems, you can resume the build with the command
[ERROR] mvn <goals> -rf :simulator
ERROR: Job failed: exit status 1