Automatic merge from submit-queue.

Add openshift_gcp_multizone bool

Add openshift_gcp_multizone bool that defaults
to False to enable users to support multizone
deployments on gcp.

Fixes: https://bugzilla.redhat.com/show_bug.cgi?id=1542843

Add openshift_gcp_multizone bool that defaults
to False to enable users to support multizone
deployments on gcp.

Fixes: https://bugzilla.redhat.com/show_bug.cgi?id=1542843

This commit ensures that user get better information
regarding variables that need to be defined in
inventory when using gcp.

Fixes: https://bugzilla.redhat.com/show_bug.cgi?id=1541589

This moves all core functionality into the openshift-ansible repo, adds
the necessary equivalent entrypoint to the openshift-ansible installer
image, and ensures the dynamic inventory mechanisms in openshift-ansible
continue to work.

Notable changes from origin-gce:

* playbook extensions changed to .yml
* dynamic inventory subdirectory created to prevent accidental use
* use the custom entrypoint entrypoint-gcp for this image
* move tasks into openshift_gcp role

Automatic merge from submit-queue.

Fix Cinder Persistent Volume support

This documents how to use Cinder-backed persistent volumes with OpenStack.

It needed a change to the dynamic inventory because the "openstack" cloudprovider plugin does actually require internal name resolution -- and the `openshift_hostname` value must match the name of the Nova server.

In addition, we need to be able to specify the V2 of the Cinder API for now as described in: https://github.com/openshift/openshift-docs/issues/5730

Add vsphere provider

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.