Bumping version of service catalog image for 3.7

roles/openshift_service_catalog/vars/openshift-enterprise.yml

@@ -1,3 +1,3 @@
 ---
 __openshift_service_catalog_image_prefix: "registry.access.redhat.com/openshift3/ose-"
-__openshift_service_catalog_image_version: "v3.6"
+__openshift_service_catalog_image_version: "v3.7"