Fixed - releaseConnection may not execute correctly

[seakider]

1. use redis-cli "set test test"
2. run the code
   RBatch batch = client.createBatch(BatchOptions.defaults().executionMode(ExecutionMode.REDIS_WRITE_ATOMIC)); batch.getAtomicLong("test").incrementAndGetAsync(); batch.executeAsync();

that will cause a RedisException, then the connection that 'batch' used will not release.

[mrniko]

Thanks for contribution!