factotum: fix urllib2 import so it no longer relies on a demandimport bug

demandimport will do that urllib2 can be imported 'from mercurial' even though
it doesn't exist there.

hgext/factotum.py

@@ -47,8 +47,8 b' service entry controls the service name '
 
 from mercurial.i18n import _
 from mercurial.url import passwordmgr
-from mercurial import httpconnection, urllib2, util
-import os
+from mercurial import httpconnection, util
+import os, urllib2
 
 ERRMAX = 128