Update failing CLI content view tests

Update field lookup from repositories to yum-repositories on content
view info output.

Wrap unwrapped CLI factory calls with try/except.

Skip test_cv_associate_composite_dupe_modules_negative because a bug (BZ
1162799) that prevents that a puppet module to be added to a content
view by its name.

Use random choice to select a puppet module to be added instead of aways
getting the first one available.

Update field lookup from lifecycle-environments to environments for
content view info output.

"Readability counts."
State the actual return code?