bug 1497401. Default logging and metrics images to 3.7

roles/openshift_logging/vars/openshift-enterprise.yml

@@ -1,3 +1,3 @@
 ---
 __openshift_logging_image_prefix: "{{ openshift_hosted_logging_deployer_prefix | default('registry.access.redhat.com/openshift3/') }}"
-__openshift_logging_image_version: "{{ openshift_hosted_logging_deployer_version | default ('v3.6') }}"
+__openshift_logging_image_version: "{{ openshift_hosted_logging_deployer_version | default ('v3.7') }}"

roles/openshift_metrics/vars/openshift-enterprise.yml

@@ -1,3 +1,3 @@
 ---
 __openshift_metrics_image_prefix: "registry.access.redhat.com/openshift3/"
-__openshift_metrics_image_version: "v3.6"
+__openshift_metrics_image_version: "v3.7"