Flavor update cli support for v2

Change-Id: I03597513ac1f95ddf81eb6a247c75b5568257d64

zaqarclient/queues/v2/cli.py

@@ -83,3 +83,8 @@ class DeleteFlavor(cli.DeleteFlavor):
 class ShowFlavor(cli.ShowFlavor):
     """Display flavor details"""
     pass
+
+
+class UpdateFlavor(cli.UpdateFlavor):
+    """Update a flavor's attributes"""
+    pass