Update prometheus to 2.0.0 GA

roles/openshift_prometheus/vars/default_images.yml

@@ -6,7 +6,7 @@ l_openshift_prometheus_alertmanager_image_prefix: "{{ openshift_prometheus_alter
 l_openshift_prometheus_alertbuffer_image_prefix: "{{ openshift_prometheus_alertbuffer_image_prefix | default(l_openshift_prometheus_image_prefix) }}"
 
 # image version defaults
-l_openshift_prometheus_image_version: "{{ openshift_prometheus_image_version | default('v2.0.0-dev.3') }}"
+l_openshift_prometheus_image_version: "{{ openshift_prometheus_image_version | default('v2.0.0') }}"
 l_openshift_prometheus_proxy_image_version: "{{ openshift_prometheus_proxy_image_version | default('v1.0.0') }}"
 l_openshift_prometheus_alertmanager_image_version: "{{ openshift_prometheus_alertmanager_image_version | default('v0.9.1') }}"
 l_openshift_prometheus_alertbuffer_image_version: "{{ openshift_prometheus_alertbuffer_image_version | default('v0.0.2') }}"