fix code coverage and org_user_rm response bug found in the process

I found that I missed a test for this portion of code, and when building the test found there was a bug. Go figure!

The bug was in the form of a rogue closing parenthesis that was syntactically valid. It would have printed a nonsense message on failure.
bump version to v0.0.15
Merge pull request #29 from PagerDuty/improve_coverage

fix code coverage and org_user_rm response bug found in the process