Upgrade latest jedis version 2.6.1 to support latest redis 2.8.18 new features and commands

[mindwind]

From redis 2.8.5 to 2.8.18 we miss theses new features and commands

NEW     - CLIENT PAUSE
NEW     - ZLEXCOUNT
NEW     - ZRANGEBYLEX
NEW     - ZREMRANGEBYLEX
NEW     - ROLE command added
NEW     - BITPOS
NEW     - DEBUG ERROR
NEW     - CLIENT KILL new form to kill by client type and ID
NEW     - CLIENT LIST new unique incremental ID to every client.
NEW     - The COMMAND command, exposing the Redis command table as an API.
NEW     - The new latency monitoring feature, as documented at http://redis.io/topics/latency-monitor
NEW     - Pub/Sub PING
NEW     - DEBUG POPULATE
NEW     - Total and instantaneous Network bandwidth tracking in INFO.

[mindwind]

supported

- ZLEXCOUNT   ZRANGEBYLEX   ZREMRANGEBYLEX  already added
- BITPOS added
- CLIENT KILL new form added
- CLIENT LIST api doesn't need to change

unsupported

- 2.8.8   DEBUG ERROR         
- 2.8.12  ROLE         
- 2.8.13  COMMAND               
- 2.8.13  LATENCY
- 2.8.14  PUBSUB PING 
- 2.8.18  DEBUG POPULATE  
- 2.9.50  CLIENT PAUSE                       

[mindwind]

Jedis release version 2.7.0, check it later for missing commands.

[mindwind]

Upgrade jedis to version 2.7.2 at Atom version 3.1.2