CI jobs are succeeding despite errors in them

[punkrokk]

st2chatops build and test jobs showing green :heavy_check_mark: status, ignoring error return codes during the script executions.

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• Set all st2chatops builds to fail upon errors.

• Ensure not a breaking change

• [x] el7

• [x] el6

• [x] bionic

• [x] xenial

• [x] trusty

[arm4b]

Just updated the issue with more accurate description.

Also, looks like we actually had this bug for a long time: https://github.com/StackStorm/st2chatops/issues/48

[arm4b]

Duplicate of #48