configure codecov

[epassaro]

Description

• Minimum codecov configuration.
• Rewrote .coveragerc based on Coverage sample configuration file.

I found tests from visualization and montecarlo_numba were taken into account to measure coverage, that's not right!. Tests always are 100% covered (all tests lines are executed during tests, lol) so now we have a lower but more realistic coverage. This was discovered by using better wildcards.

Summarizing, coverage moved from 73 to 60 files thanks to modifying .coveragerc:

• 1 conftest.py at the root of the package
• 1 cmfgen2tardis.py script
• 2 tests from visualization
• 8 tests from montecarlo_numba + 1 conftests.py

Motivation and context
Codecov is failing too often even while PRs are not changing source files.

How has this been tested?

• Testing pipeline.
• Other.

Examples

Type of change

• Bug fix.
• New feature.
• Breaking change.
• None of the above.

Checklist

• My change requires a change to the documentation.
  • I have updated the documentation accordingly.
  • (optional) I have built the documentation on my fork following the instructions.
• I have assigned and requested two reviewers for this pull request.

[tardis-bot]

Before a pull request is accepted, it must meet the following criteria:

• Is the necessary information provided?
• Is this a duplicate PR?
  • If a new PR is clearly a duplicate, ask how this PR is different from the original PR?
  • If this PR is about to be merged, close the original PR with a link to this new PR that solved the issue.
• Does it pass existing tests and are new tests provided if required?
  • The test coverage should not decrease, and for new features should be close to 100%.
• Is the code tidy?
  • No unnecessary print lines or code comments.

[codecov]

Codecov Report

Merging #1645 (378a41d) into master (8ceacc0) will decrease coverage by 5.14%.
The diff coverage is n/a.

❗ Current head 378a41d differs from pull request most recent head 1a78bf8. Consider uploading reports for the commit 1a78bf8 to get more accurate results

@@            Coverage Diff             @@
##           master    #1645      +/-   ##
==========================================
- Coverage   67.13%   61.98%   -5.15%     
==========================================
  Files          73       62      -11     
  Lines        6100     5695     -405     
==========================================
- Hits         4095     3530     -565     
- Misses       2005     2165     +160     

Impacted Files	Coverage Δ
tardis/tardis/scripts/cmfgen2tardis.py	0.00% <0.00%> (ø)
...ntecarlo_numba/tests/test_numba_formal_integral.py
...s/montecarlo/montecarlo_numba/tests/test_packet.py
...rlo/montecarlo_numba/tests/test_numba_interface.py
...dis/montecarlo/montecarlo_numba/tests/test_base.py
...ntecarlo/montecarlo_numba/tests/test_macro_atom.py
...tecarlo/montecarlo_numba/tests/test_interaction.py
tardis/tardis/conftest.py
...rdis/montecarlo/montecarlo_numba/tests/conftest.py
.../montecarlo/montecarlo_numba/tests/test_vpacket.py
... and 5 more

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[andrewfullard]

Ironic that this fails codecov itself