Change StringRedisConnection set store return types

DATAREDIS-211

Change sUnionStore, sDiffStore, and sInterStore from
void to Long return type
Add FutureResult and common type converters for pipelined ops

DATAREDIS-200
Convert Jedis pipelined results to correct data type

DATAREDIS-200
Convert Lettuce pipelined results to correct data type

DATAREDIS-200
Convert SRP pipelined results to correct data type

DATAREDIS-200

- Convert return of closePipeline() to same types
returned from individual operations

- Change SRP execute to return Reply.data() 
instead of Reply for consistency with pipeline
Deprecate connection Utils in favor of Converters

DATAREDIS-200
Add deserialize of pipeline results to DefaultStringRedisConnection

DATAREDIS-200
Validate converted pipeline results in conn tests

DATAREDIS-200