Code coverage improvements

[bkoelman]

Exclude obsolete members, prevent usage of stale coverage results in local build.

Closes #1348

QUALITY CHECKLIST

• Changes implemented in code
• Complies with our contributing guidelines
• Adapted tests
• N/A: Documentation updated

[codecov]

Codecov Report

Merging #1357 (ead8a64) into master (ed1ff0d) will increase coverage by 0.04%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #1357      +/-   ##
==========================================
+ Coverage   89.68%   89.73%   +0.04%     
==========================================
  Files         268      268              
  Lines        8802     8795       -7     
  Branches     1526     1523       -3     
==========================================
- Hits         7894     7892       -2     
+ Misses        612      607       -5     
  Partials      296      296              

see 4 files with indirect coverage changes