Update 3ware check to not alert on VERIFYING disks

Right now this 3ware check has the ability to allow for VERIFYING to be
treated as an acceptable state for arrays.  However, this state is not
acceptable for individual drives. Plumb this logic through to the
test_drives routine.
Update to include REBUILDING and INITIALIZING

Might as well pull in all of the possible states.
Merge pull request #424 from craigtracey/verifydisk

Update 3ware check to not alert on VERIFYING disks