This class was built into the framework from its early days but it's not used anywhere. Remove it along with its tests https://fedorahosted.org/freeipa/ticket/3460 Reviewed-By: Jan Cholasta <jcholast@redhat.com>
When reporting argument errors, show also a context -- what is processed, what is the name of the command.
Rename the 'tests' directory to 'ipa-tests', and create an ipa-tests RPM containing the test suite Part of the work for: https://fedorahosted.org/freeipa/ticket/3654
