Make default statestore failure parameters more conservative

Change the susbcriber timeout to 30s, and the number of missed heartbeats (on the
statestore side) to 10. 30s is ~3x the time it takes at maximum to process 100k objects of
~200MB in size in a 20 node cluster, according to recent experiments.

Change-Id: Ie879573311cbb12221485e5573fdee35a9350d4a
Reviewed-on: http://gerrit.ent.cloudera.com:8080/1638
Reviewed-by: Alex Behm <alex.behm@cloudera.com>
Reviewed-by: Lenni Kuff <lskuff@cloudera.com>
Tested-by: jenkins