Update apt.key tests for new wget changes.

Author: Fizzadar

tests/operations/apt.key/add_url.json

@@ -1,6 +1,6 @@
 {
     "args": ["http://mykey"],
     "commands": [
-        "apt-key adv --fetch-keys http://mykey"
+        "wget -O- http://mykey | apt-key add -"
     ]
 }