Reduce gossip memory use by interning VersionedValue strings
patch by jbellis; tested by Quentin Conner for CASSANDRA-6410
Merge branch 'cassandra-1.2' into cassandra-2.0
Revert "Reduce gossip memory use by interning VersionedValue strings"

This reverts commit 7ad39601dd3c248595d84f016c41ac35abd786ed.
Merge branch 'cassandra-1.2' into cassandra-2.0
Reduce gossip memory use by interning VersionedValue strings
patch by jbellis; tested by Quentin Conner for CASSANDRA-6410