Fixed test skipping

[sseraj]

Purpose

I removed unnecessary test skipping in the FFD and ESP tests introduced in #170. I also split up the VSP test classes so that the wing tests are not parameterized, avoiding the need to skip the parallel tests. It seems like the wing tests might work in parallel now, but I will leave it to someone who uses VSP to verify this and enable the parallel tests in a future PR.

Finally, I switched the Docker image used by Azure to public and removed the check for private images in the test command because the public images have all the required dependencies now.

Closes #178

Expected time until merged

ASAP because the buildbot is broken

Type of change

• [x] Bugfix (non-breaking change which fixes an issue)
• [ ] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (non-backwards-compatible fix or feature)
• [ ] Code style update (formatting, renaming)
• [ ] Refactoring (no functional changes, no API changes)
• [ ] Documentation update
• [x] Maintenance update
• [ ] Other (please describe)

Testing

All tests should pass on Azure with no skipped tests.

Checklist

• [x] I have run flake8 and black to make sure the Python code adheres to PEP-8 and is consistently formatted
• [ ] I have formatted the Fortran code with fprettify or C/C++ code with clang-format as applicable
• [x] I have run unit and regression tests which pass locally with my changes
• [ ] I have added new tests that prove my fix is effective or that my feature works
• [ ] I have added necessary documentation

[eirikurj]

Haha, great timing @sseraj, just wrote an issue (see https://github.com/mdolab/pygeo/issues/178) for this and was about this push a fix. Thanks for taking care of this.

[codecov[bot]]

Codecov Report

Merging #177 (904ddfa) into main (0e67ef4) will increase coverage by 3.98%. The diff coverage is n/a.

@@            Coverage Diff             @@
##             main     #177      +/-   ##
==========================================
+ Coverage   60.63%   64.61%   +3.98%     
==========================================
  Files          47       47              
  Lines       11954    11954              
==========================================
+ Hits         7248     7724     +476     
+ Misses       4706     4230     -476     

Impacted Files	Coverage Δ
pygeo/parameterization/DVGeoSketch.py	68.22% <0.00%> (+0.93%)	:arrow_up:
pygeo/parameterization/designVars.py	79.25% <0.00%> (+4.25%)	:arrow_up:
pygeo/parameterization/DVGeoESP.py	66.29% <0.00%> (+65.31%)	:arrow_up:

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