Tests getting malformed URL error on py35/py36 when running against master

[raildo]

Some jobs for py35 and py36 when is running against the master(the same tests works well locally) on changes related to improvement in the error reporting message in the custodia-cli are failing for malformed URL.

Improvement in the error reporting message: https://s3.amazonaws.com/archive.travis-ci.org/jobs/214772342/log.txt

More improvements for custodia-cli error reporting - same issues

[raildo]

• In the case of the commit baacf4f the tests passed after a recheck on the failing job (py36)