Update jedis sync client with thread pooling

[acarbonetto]

Before:

Exception in thread "main" java.lang.RuntimeException: java.util.concurrent.ExecutionException: redis.clients.jedis.exceptions.JedisConnectionException: java.net.SocketException: Broken pipe
        at glide.benchmarks.utils.Benchmarking.testClientSetGet(Benchmarking.java:163)
        at glide.benchmarks.BenchmarkingApp.main(BenchmarkingApp.java:51)
Caused by: java.util.concurrent.ExecutionException: redis.clients.jedis.exceptions.JedisConnectionException: java.net.SocketException: Broken pipe

Fixed:

> ./install_and_test.sh -$CLIENT -tasks 1 10 100 1000 -data $DATASIZE -clients 1 -host $HOST -tls -is-cluster;

...

 =====> Jedis <===== 1 clients 1000 concurrent 100 data size 

Runtime s: 273.788191
Iterations: 10000000
TPS: 36524.584858
===> GET_EXISTING <===
avg. time ms: 0.000405
std dev ms: 0.001159
p50 latency ms: 0.000173
p90 latency ms: 0.000322
p99 latency ms: 0.005903
Total hits: 6398289
===> GET_NON_EXISTING <===
avg. time ms: 0.000412
std dev ms: 0.001178
p50 latency ms: 0.000172
p90 latency ms: 0.000331
p99 latency ms: 0.005983
Total hits: 1598783
===> SET <===
avg. time ms: 0.000425
std dev ms: 0.001189
p50 latency ms: 0.000181
p90 latency ms: 0.000375
p99 latency ms: 0.006031
Total hits: 2002928
Total hits: 10000000

Also tested using standalone cluster.