unittests: disable coverage report filtering

[maciejbocianski]

Summary of changes

Disable coverage report filtering because of poor results.

e.g. mbed test --unittests -r Socket --coverage htmlg
This command will run all unittests with names containing Socket and then create coverage report with the same scheme, filtering all source files with names containing Socket.

The problem is that coverage report will be correct only when filtered test name will be the same as corresponding source file name (to be covered) - the same (-r) pattern is used to filter both test names and source file names used in coverage report

Due to described problems it was decided to disable coverage report filtering.
-r will only filter test names and pattern won't be passed to coverage report generator.

Impact of changes

Migration actions required

Documentation

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Pull request type

[] Patch update (Bug fix / Target update / Docs update / Test update / Refactor)
[X] Feature update (New feature / Functionality change / New API)
[] Major update (Breaking change E.g. Return code change / API behaviour change)

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Test results

[] No Tests required for this change (E.g docs only update)
[X] Covered by existing mbed-os tests (Greentea or Unittest)
[] Tests / results supplied as part of this PR

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Reviewers

@jamesbeyond
@michalpasztamobica

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[michalpasztamobica]

Thanks for this change. It makes perfect sense to filter only the test cases and then see the whole picture of what they cover (especially for moduletests).

[ciarmcom]

@maciejbocianski, thank you for your changes.
@michalpasztamobica @ARMmbed/mbed-os-maintainers please review.

[0xc0170]

CI started

[mbed-ci]

Test run: SUCCESS

Summary: 1 of 1 test jobs passed
Build number : 1
Build artifacts

[jamesbeyond]

LGTM