Fix more cases of zope.__file__. In case of zope.app.locales.extract …

…we don't

have to do anything now.  When this script eventulaly moves somewhere else
to be better reusable (zope.i18n perhaps), the code should be refactored (added
TODO comment).

THis addresses collector #683.

utilities.py

@@ -23,7 +23,7 @@
 import inspect
 from os.path import dirname
 
-import zope
+import zope.app
 from zope.interface import implements, implementedBy
 from zope.publisher.browser import TestRequest
 from zope.security.checker import getCheckerForInstancesOf, Global
@@ -43,7 +43,7 @@
 
 _marker = object()
 
-BASEDIR = dirname(dirname(dirname(zope.__file__)))
+BASEDIR = dirname(dirname(dirname(dirname(zope.app.__file__))))
 
 def relativizePath(path):
     return path.replace(BASEDIR, 'Zope3')