Description of problem:
Having a BPM cluster with 2 nodes and working with it (authoring, process execution), server logs grow to tenth MB after several minutes. Majority of the content are helix communication messages with INFO log level.

Version-Release number of selected component (if applicable):
6.1.0.DR3

Steps to Reproduce:
1. configure BPM cluster with 2 nodes
2. clone there a repository, start any process - just work with it
3. see both server logs growing

Expected results:
INFO messages about helix/zookeeper communication could be switched to DEBUG or TRACE level.