PLAT-493- change message on the error thrown from service when the plugin is not enabled for partner
Merge branch 'IX-9.5.0' into IX-9.5.0-PLAT-493

Conflicts:
	plugins/drm/services/DrmProfileService.php
Merge pull request #463 from kaltura/IX-9.5.0-PLAT-493

Ix 9.5.0 plat 493