webadmin: Introduce CPU profiles

* CPU profiles sub tab added under Cluster Main tab.
* Added create, edit and remove cpu profile dialog
* Added permissions inner tab within CPU profiles sub tab, to allow
setting permission on CPU profile.
* Disk Profile's models common logic was extracted to common base classes, in
order to suit CPU profiles Models.

Change-Id: I0c51fa8559f9538bb29b41d1d1b24fdfdabc8cb1
Bug-Url: https://bugzilla.redhat.com/1084930
Signed-off-by: Gilad Chaplik <gchaplik@redhat.com>