core: display correct status on error message

When a disk isn't on applicable status the displayed status in the CDA
message should be the applicable status and not the current disk status.

Change-Id: I611d2d3c5561c4d40a1c1a19b2844c0fe01ae026
Related-To: https://bugzilla.redhat.com/show_bug.cgi?id=1114431
Signed-off-by: Liron Aravot <laravot@redhat.com>