Set puppet-redis managed_by_cluster_manager to true

Set puppet-redis managed_by_cluster_manager to true

Via https://github.com/arioch/puppet-redis/pull/192 puppet-redis grew
ulimit support also for pacemaker managed redis instances. To be able to
use that we need to set redis::managed_by_cluster_manager to true.

We also allow redis::ulimit to be configurable and we set a default of
10420 which was the default value before the above change.

Change-Id: I06129870665d7d3bfa09057fd9f0a33a99f98397
Depends-On: I4ffccfe3e3ba862d445476c14c8f2cb267fa108d
Closes-Bug: #1688464