Switch logging and metrics OCP image tag from 3.6.0 to v3.6

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 ('3.6.0') }}"
+__openshift_logging_image_version: "{{ openshift_hosted_logging_deployer_version | default ('v3.6') }}"

roles/openshift_metrics/vars/openshift-enterprise.yml

@@ -1,3 +1,3 @@
 ---
 __openshift_metrics_image_prefix: "{{ openshift_hosted_metrics_deployer_prefix | default('registry.access.redhat.com/openshift3/') }}"
-__openshift_metrics_image_version: "{{ openshift_hosted_metrics_deployer_version | default ('3.6.0') }}"
+__openshift_metrics_image_version: "{{ openshift_hosted_metrics_deployer_version | default ('v3.6') }}"