Updated CI to expose a bug in bilby_result for python2.7, then fixed it

This MR updates the CI to run a few more basic checks, including --help on all installed scripts.

This exposed a bug in bilby_result for python2.7 where print is used as an attribute name (see pipeline #80948). It is forbidden to use reserved keywords as attribute names (in python3, print is just a builtin function). So, I renamed that attribute keys which made sense to me in context.

changed the description

approved this merge request

@duncanmmacleod is this breaking something down the line? We just did a release,how urgently do we need to get this released and in master?

Without this fix, bilby cannot be built for/installed with python2.7, it's up to you how serious you think that is.

approved this merge request

changed milestone to %0.5.8

merged

mentioned in commit fa8912ef