Currently, containerized load balancers may not have docker
configured by openshift-ansible.

This commit ensures that containerized load balancers have
the openshift_docker role applied.

Fixes: https://bugzilla.redhat.com/show_bug.cgi?id=1496756

Automatic merge from submit-queue.

Allow checkpoint status to work across all groups

Conditionals placed in inventories were not being applied to localhost causing the checkpoint status to not be updated properly.  Moving to the `oo_all_hosts` group will correctly pick up the conditional and apply regardless of which group (or host) may have that conditional set.

Currently, profiles for the tuned daemon are set only for
OpenShift node(s).  This excludes the OpenShift loadbalancer.
As a result, ARP cache limits on loadbalancers are not raised.
This causes problems with HA setups where loadbalancers serve
1k+ OpenShift nodes.

This commit ensures the openshift-control-plane role is applied
to loadbalancers, masters and OpenShift infra nodes.  Regular
OpenShift worker nodes get the openshift-node profile.

Fixes: https://bugzilla.redhat.com/show_bug.cgi?id=1498213

- Added installer_checkpoint role and callback plugin
- Added checkpoint 'Start' and 'End' plays to each installation phase

Additional items related to enabling proper checkpointing:
- Removed openshift_set_hostname and related task (related to 3.0)
- Added openshift-hosted entry point playbook
- Moved openshift metrics and logging out of openshift_hosted playbook
- Moved API Aggregation play to master install