[MavenV2, MavenV3]: Fixed bug when task succeeds on tests failure

[matskan]

Task name: MavenV2, MavenV3

Description: Maven task succeeded when tests failed. It was caused by incorrect exception handling on last stage of build.
Now the build will fail if tests don't finish successfully.
Added new optional input: allowBrokenSymlinks. If it is set false the task will fail when it finds bad symbolic link during publishing tests. For backward-combability it is set true by default to ignore incorrect symbolic links when task tries to publish tests.

Documentation changes required: Yes
Added unit tests: No
Attached related issue: #14514

Checklist:

• Task version was bumped - please check instruction how to do it
• Checked that applied changes work as expected
• There’s no risky dependency updates
• Changes has been tested
• Enough test coverage for changes, and current test coverage for task doesn't look poor
• We understand how tasks is working, how changes affect task behavior
• There is no breaking changes
• There is no any other concerns
• I have not discovered any new uncovered test/use cases

✔️ Maven V3 succeeds when tests are passed and there is a bad symlink when task tries to publish tests (allowBrokenSymlinks = true)
❌ Maven V3 fails when tests are passed (allowBrokenSymlinks = false). There is a bad symlink when task tries to publish tests
❌ Maven V3 fails when tests are failed

✔️ Maven V2 succeeds when tests are passed and there is a bad symlink when task tries to publish tests (allowBrokenSymlinks = true)
❌ Maven V2 fails when tests are passed (allowBrokenSymlinks = false). There is a bad symlink when task tries to publish tests)
❌ Maven V2 fails when tests are failed

✔️ On canary app

[ghost]

All CLA requirements met.

[vladislav-ryzhov]

Manually tested these changes in this pipeline https://dev.azure.com/v-vryzhov/test/_build?definitionId=2 (#20210326.7, #20210326.6).
Tested MavenV2 and MavenV3 version with a basic java project. Build worked as expected: tests fail and the task fails too.

[anatolybolshakov]

LGTM, thanks!

[DaniilShmelev]

Tested these changes manually, everything is working as expected:
✔ Maven V2 test failures before
✔ Maven V3 test failures before
❌ Maven V2 test failures after
❌ Maven V3 test failures after
❌ Don't allow broken symlinks
✔ Allow broken symlinks

Take a look at the suggestion, but other than that LGTM!