Merge ~mpontillo/maas:delete-discoveries-by-mac-and-ip--forgotten-line into maas:master

[Mike Pontillo]

Fix missing delete_by_mac_and_ip in discovery handler allowed_methods.

[Blake Rouse (blake-rouse)]

lgtm!

review: Approve

diff --git a/src/maasserver/websockets/handlers/discovery.py b/src/maasserver/websockets/handlers/discovery.py
index 4213c5b..07329b0 100644
--- a/src/maasserver/websockets/handlers/discovery.py
+++ b/src/maasserver/websockets/handlers/discovery.py
@@ -35,6 +35,7 @@ class DiscoveryHandler(ViewModelHandler):
             'list',
             'get',
             'clear',
+            'delete_by_mac_and_ip',
         ]
 
     def list(self, params):