Add deric-zookeeper module setup to acceptance spec helper.
Add deric-zookeeper module setup to acceptance spec helper.

The acceptance test for the running druid services need a working
instance of zookeeper to connect to.  The deric-zookeeper module is used
to accomplish this and its utilization has been added to
spec_helper_acceptance.rb to initialize the test VM.

MrAlias/druid,sevenpvn/druid,MrAlias/druid,sevenpvn/druid