Document service_type for openshift-enterprise

Based on source code in roles/openshift_facts/library/openshift_facts.py

DEPLOYMENT_TYPES.md

@@ -10,7 +10,7 @@ The table below outlines the defaults per `openshift_deployment_type`:
 
 | openshift_deployment_type                                       | origin                                   | openshift-enterprise                   |
 |-----------------------------------------------------------------|------------------------------------------|----------------------------------------|
-| **openshift.common.service_type** (also used for package names) | origin                                   |                                        |
+| **openshift.common.service_type** (also used for package names) | origin                                   | atomic-openshift                       |
 | **openshift.common.config_base**                                | /etc/origin                              | /etc/origin                            |
 | **openshift.common.data_dir**                                   | /var/lib/origin                          | /var/lib/origin                        |
 | **openshift.master.registry_url openshift.node.registry_url**   | openshift/origin-${component}:${version} | openshift3/ose-${component}:${version} |