WIP: do not merge: pyyaml pin test

[olyoberdorf]

making a 3.0.x branch equivalent without the pyyaml version pin for testing

when this passes we know we can remove that

[codecov]

Codecov Report

Merging #337 (d5ce2f0) into release/3.0.x (3e3f92b) will not change coverage.
The diff coverage is n/a.

@@              Coverage Diff               @@
##           release/3.0.x     #337   +/-   ##
==============================================
  Coverage          57.85%   57.85%           
==============================================
  Files                268      268           
  Lines              22948    22948           
==============================================
  Hits               13276    13276           
  Misses              9672     9672           

Flag	Coverage Δ
gmosls	42.03% <ø> (ø)
integration	47.21% <ø> (ø)
unit	45.97% <ø> (ø)

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