Print exceptions when saving data fails in admin UI

There were places where a broad exception was caught when saving
administrative changes but the actual exception wasn't logged. The
user was presented only with a 'Failed to save data!' message.

https://fedorahosted.org/ipsilon/ticket/39

Signed-off-by: Rob Crittenden <rcritten@redhat.com>
Reviewed-by: Simo Sorce <simo@redhat.com>