Raise 409 exception while deleting running container

Change-Id: I597cbd473e204dd244e95e4814bf650437b540c9
Closes-Bug: #1614384

zun/common/exception.py

@@ -339,3 +339,9 @@ class ContainerNotFound(HTTPNotFound):
 
 class ContainerAlreadyExists(ResourceExists):
     message = _("A container with UUID %(uuid)s already exists.")
+
+
+class ContainerRunningException(ZunException):
+    message = _("The container %(id)s is running."
+                "Please stop and delete the container.")
+    code = 409

zun/compute/manager.py

@@ -72,6 +72,9 @@ class Manager(object):
             return container
         except Exception as e:
             LOG.exception(_LE("Unexpected exception: %s"), str(e))
+            if e.response.status_code == 409:
+                raise exception.ContainerRunningException(
+                    id=container.container_id)
             raise e
 
     @translate_exception