Title: #1121: Remove the `message` attribute from exceptions
This is causing python2 tests print ugly warnings about the
deprecation of the `message` attribute in python2.6.
I had some time between reviews when the tests were running and noticed some ugly strings
in python2 test results so I'm posting this.
To pull the PR as Git branch:
git remote add ghfreeipa https://github.com/freeipa/freeipa
git fetch ghfreeipa pull/1121/head:pr1121
git checkout pr1121