Bump up zookeeper version to 3.4.5 (#526)
Bump up zookeeper version to 3.4.5 (#526)

Recent upgrade to zk client version 0.7 breaks PerfBenchmarkRunner
for some missing classes at runtime. Upgrading zookeeper version
to 3.4.5 to test this.

Testing:
1. PerfBenchmarkRunner works
2. multi-product testing
apucher/pinot,apucher/pinot,fx19880617/pinot-1,sajavadi/pinot,linkedin/pinot,linkedin/pinot,linkedin/pinot,sajavadi/pinot,fx19880617/pinot-1,sajavadi/pinot,fx19880617/pinot-1,fx19880617/pinot-1,apucher/pinot,linkedin/pinot,sajavadi/pinot,linkedin/pinot,apucher/pinot,apucher/pinot,fx19880617/pinot-1,sajavadi/pinot