Tweaks to clear_config calls in tests in order to prevent side effects on config during test suite execution.

test/http/request_builder_test.exs

@@ -9,6 +9,7 @@ defmodule Pleroma.HTTP.RequestBuilderTest do
 
   describe "headers/2" do
     clear_config([:http, :send_user_agent])
+    clear_config([:http, :user_agent])
 
     test "don't send pleroma user agent" do
       assert RequestBuilder.headers(%{}, []) == %{headers: []}