Fix pvmove abort when temporary mirror fails to be cluster-aware.

Fix pvmove abort when temporary mirror fails to be cluster-aware.

When activation of pvmove mirror fails on cluster, some nodes
still possibly succeeded in activation.

 - Explicitly deactivate that mirror to be sure
 - properly pair suspend/resume calls to not cause memory lock problems in clvmd

Code cannot simply call _finish_pvmove on cluster in this situation, because
changed LVs are suspended twice (causing memory inbalance) and also temporary
mirror is activated when it is not expected (and we know that it failed already).

Patch prepares special function which remove temporary mirror references from
metadata and then resumes changed LVs.