Option to not fail build if Coveralls upload fails

[alex-deaconu]

It's the second time in a short period of time that coveralls uploads fail due to their infrastructure issues. Builds should be allowed to pass despite this non critical failure.

Provide an option to not throw a critical error allowing builds to pass despite upload failures.

[spiercey]

As a quick fix for this in our projects we've removed the orb and brought the source into our projects and added || true to the calls to coveralls.

IE cat << parameters.path_to_lcov >> | coveralls || true

Note this isn't fully baked and has it's own downfalls but at least it isn't breaking our pipeline.

New issues:

• If you have coveralls checks on your PRs they will be stuck in waiting state
• The pipeline won't notify you if coveralls is down.

In the long term we are planning on replacing the coveralls orb to solve those problems but in the short term the above could help you out quickly.

[alex-deaconu]

Thanks for the suggestion @spiercey. We just disabled the upload for now.

Previously we were doing something similar, but opted for the convenience of an orb. It's probably a good idea to phase it out as you've mentioning for the long term.