idviews: prevent applying to a master
Custom IDViews should not be applied to IPA master nodes. Add a
check enforcing this rule in idview_apply command.
Fixes: https://pagure.io/freeipa/issue/5662
Signed-off-by: Florence Blanc-Renaud <flo@redhat.com>
Reviewed-By: Christian Heimes <cheimes@redhat.com>