This commit relocates filter_plugings to lib_utils,
changes the namespacing to prevent unintended use of
older versions that may be present in filter_plugins/
directory on existing installs.

Add lib_utils to meta depends for roles

Also consolidate some plugins into lib_utils from
various other areas.

Update rpm spec, obsolete plugin rpms.

Problem was caused by facts not being set for that master. To fix this
patch cleans up the calculation of metricsPublicURL in general. Because
this value is used in openshift_master to template into the master
config file, we now define these facts more clearly in
openshift_master_facts, and add a dependency on this to
openshift_metrics.

The calculation of default sub-domain is also changed to remove it from
system facts (as neither of these are facts about the system) and
instead use plain variables.

* Ansible systemd module used in place of service module
* Refactored command tasks which are no longer necessary
* Applying rules from openshift-ansible Best Practices Guide