Add missing abstract method impl for OpenStack

cloudbridge/cloud/providers/openstack/services.py

@@ -430,6 +430,10 @@ class OpenStackComputeService(BaseComputeService):
         self._region_svc = OpenStackRegionService(self.provider)
         self._images = OpenStackImageService(self.provider)
 
+    @property
+    def images(self):
+        return self._images
+
     @property
     def instance_types(self):
         return self._instance_type_svc