Ticket 48177 - dynamic plugins should not return an error when modifying a critical plugin
Bug Description: When dynamic plugins are enabled, any update to a "critical" plugin
is rejected.
Fix Description: The operation should still be allowed, even though the change might
not be dynamically applied. Log an error instead stating that a
restart might be required.
https://fedorahosted.org/389/ticket/48177
Reviewed by: rmeggins(Thanks!)