[Tests] Comment out failing test cases

Platform-specific failures observed for
specific test cases in table. Possibly
related to platform-specific font
metrics. Tests are at an edge where
behavior changes significantly based on
a difference of a few pixels, so
disabling these specific cases for the
time being.

This commit is workaround for
nasa/mct#205 to avoid blocking unrelated
development.
Merge branch 'master' into mctPlugins72