204 configure automatic test coverage report

[sgobotta]

Description

Please include a summary of the change and which issue is fixed. Please also include relevant motivation and context. List any dependencies that are required for this change.

This PR provides:

• Automatic unit test coverage generation using codecov

Closes #204

Type of change

Please delete options that are not relevant.

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

How Has This Been Tested?

Please describe the tests that you ran to verify your changes. Provide instructions so we can reproduce the cases. Please also list any relevant details for your test configuration

Checklist:

The following options in bold are required for a PR approval. Please check the boxes only if necessary, it help us minimizing the reviewing process.

• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes

[codecov-io]

Codecov Report

Merging #205 into develop will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff            @@
##           develop     #205   +/-   ##
========================================
  Coverage    40.73%   40.73%           
========================================
  Files           96       96           
  Lines          766      766           
  Branches        30       30           
========================================
  Hits           312      312           
  Misses         451      451           
  Partials         3        3

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