Erasure Coding: ECZoneManager#getECZoneInfo is not resolving the path properly if zone dir itself is the snapshottable dir

Presently the resultant zone dir will come with .snapshot only when the zone dir itself is snapshottable dir. It will return the path including the snapshot name like, /zone/.snapshot/snap1. Instead could improve this by returning only path /zone.

Thanks vinayrpet for the helpful discussion