BBS: Credo fixes.

lib/pleroma/bbs/handler.ex

 defmodule Pleroma.BBS.Handler do
   use Sshd.ShellHandler
   alias Pleroma.Activity
-  alias Pleroma.Web.CommonAPI
   alias Pleroma.Web.ActivityPub.ActivityPub
+  alias Pleroma.Web.CommonAPI
 
   def on_shell(username, _pubkey, _ip, _port) do
     :ok = IO.puts("Welcome to #{Pleroma.Config.get([:instance, :name])}!")

test/bbs/handler_test.exs

@@ -2,10 +2,10 @@ defmodule Pleroma.BBS.HandlerTest do
   use Pleroma.DataCase
   alias Pleroma.Activity
   alias Pleroma.BBS.Handler
-  alias Pleroma.Web.CommonAPI
   alias Pleroma.Object
   alias Pleroma.Repo
   alias Pleroma.User
+  alias Pleroma.Web.CommonAPI
 
   import ExUnit.CaptureIO
   import Pleroma.Factory