Make linter happy

roles/openshift_logging/vars/default_images.yml

@@ -1,2 +1,3 @@
+---
 openshift_logging_image_prefix: "{{ openshift_hosted_logging_deployer_prefix | default('docker.io/openshift/origin-') }}"
 openshift_logging_image_version: "{{ openshift_hosted_logging_deployer_version | default('latest') }}"

roles/openshift_logging/vars/openshift-enterprise.yml

@@ -1,2 +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(openshift_release | default ('3.5.0') ) }}"

roles/openshift_metrics/vars/default_images.yml

@@ -1,2 +1,3 @@
+---
 openshift_metrics_image_prefix: "{{ openshift_hosted_metrics_deployer_prefix | default('docker.io/openshift/origin-') }}"
 openshift_metrics_image_version: "{{ openshift_hosted_metrics_deployer_version | default('latest') }}"

roles/openshift_metrics/vars/openshift-enterprise.yml

@@ -1,2 +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(openshift_release | default ('3.5.0') ) }}"