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

test/plugs/admin_secret_authentication_plug_test.exs

@@ -23,6 +23,8 @@ defmodule Pleroma.Plugs.AdminSecretAuthenticationPlugTest do
   end
 
   describe "when secret set it assigns an admin user" do
+    clear_config([:admin_token])
+
     test "with `admin_token` query parameter", %{conn: conn} do
       Pleroma.Config.put(:admin_token, "password123")