Added CRUD tests for Sync Plans via CLI.

Added basic CRUD functionality for sync-plans via the CLI. Also had to
modify CLI base.py create command to take on the optional
``organization-id`` argument, as some resources from Katello require
that argument for some subcommands (and create calls Info to make sure
things went ok).

Finally, filed Bugzilla issues #1082157 and #1082169 to deal with some
idiosyncrasy from hammer sync-plan command.