fix bug in Protocol.processBulkReply()

* if RedisInputStream().read() at Protocol.processBulkReply() returns
-1, it runs with unexpected behavior
* fix: check and if return value is -1, it throws
JedisConnectionException with message "server has closed the connection"
** prevent unexpected behavior, specially ArrayIndexOutOfBoundException 
*** calls System.arraycopy() with length = -1 (cause limit = -1) at
RedisInputStream.read()

add pubsub unit test scenario : client-output-buffer-limit exceed

* Redis warns event(disconnect client) to their log, and suddenly
disconnected connection
** http://redis.io/topics/clients -> Output buffers limits
** so test expects JedisConnectionException with proper message
* fix bug: test expects JedisConnectionException
** I have mistaken while verifying seeing Exception's message
* remove huge print messages
Update Gradle build to use Apache Commons Pool 2.0.
Merge pull request #485 from tague/479_gradle_build_file_fix

Update Gradle build to use Apache Commons Pool 2.0.
make jedis unit tests pass to Redis 2.8.1

* increase sentinel instance to test JedisSentinelTest
** clear() called, slave promoted to master (slave of no one), New
Sentinel force to restore it (demote) -> slave is not reusable
* ipv6 applied at Redis 2.8 -> localhost / 127.0.0.1 / ::1 is now all same

* Makefile: sleep some time for launch each sentinel (workaround to sentinel's issue)
** issue to sentinel leader vote: https://github.com/antirez/redis/issues/1419
*** sentinel may confused to vote with sentinels launched approximately same time
Merge branch 'handles-client-output-buffer-limit' of github.com:HeartSaVioR/jedis into HeartSaVioR-handles-client-output-buffer-limit
Change string size to make test fail faster
add SCAN, HSCAN, SSCAN and ZSCAN
Merge pull request #489 from xetorthio/scan_commands

add SCAN, HSCAN, SSCAN and ZSCAN
make pubsub test fast
make control command tests fast
make list command tests fast
make object command tests fast
make list command tests even faster
speed up JedisSentinelTest
make JedisTest fast
make JedisSentinelPool fast
Merge pull request #490 from xetorthio/speedup_tests

Speedup tests
add WAIT command