Fixed bug in short-cf-names

Fixed bug in HBaseKeyColumnValueStore.mutateMany(...) that was leaking
short names.  In contrast to this commit's cherry-pick counterpart,
this commit leaves short-cf-names disabled by default.  The
short-cf-names option continues to default to disabled on 0.4.x
because enabling it would be a database-breaking change.

(cherry picked from commit b533a2d18df9a90aa4913d542b7f21b8d1d7a08b)

Conflicts:
	titan-hbase/src/main/java/com/thinkaurelius/titan/diskstorage/hbase/HBaseStoreManager.java