Testing: Don't federate in testing.

test/conversation_test.exs

@@ -11,6 +11,16 @@ defmodule Pleroma.ConversationTest do
 
   import Pleroma.Factory
 
+  setup_all do
+    config_path = [:instance, :federating]
+    initial_setting = Pleroma.Config.get(config_path)
+
+    Pleroma.Config.put(config_path, true)
+    on_exit(fn -> Pleroma.Config.put(config_path, initial_setting) end)
+
+    :ok
+  end
+
   test "it goes through old direct conversations" do
     user = insert(:user)
     other_user = insert(:user)