Remove INCONSISTENT_VG flag

Remove INCONSISTENT_VG flag

As this flag could not have been set by the current code - removing it.

Note: because of the wrong code logic this call:

lvmcache_update_vg(correct_vg, correct_vg->status & PRECOMMITTED &
			   (inconsistent ? INCONSISTENT_VG : 0));

had always passed '0' - now after flag removal it's passing
PRECOMMITTED flag in - this present functinal change in this patch.

To match the original functionality - 0 had to be always passed.
More testing is needed here.