Meta server: fix VR restore, by recalculating number of active nodes, quorum, and removing incorrect epoch check.
Meta server: fix VR restore, by recalculating number of active nodes, quorum, and removing incorrect epoch check.

quantcast/qfs,quantcast/qfs,quantcast/qfs,quantcast/qfs,quantcast/qfs,quantcast/qfs,quantcast/qfs,quantcast/qfs