Allow volume create from source unless in error status

This patch restores the source volume status checking behavior
to allow create_volume function to proceed unless it is in
error status. In FibreChannel attached environment, it is typical
to have a volume attached before the volume clone starts. The
operating system owns the volume will ensure the consistency.

Fixes: bug #1214235
Change-Id: Ie639f2f36e2939399303ca0658c169124801e86b
Merge "Allow volume create from source unless in error status"