Make settings regex non greedy.

I'm surprised this didn't cause an issue before but as far as I can
figure this should always be non-greedy.  I think it worked before
because the items we were looking for was previously the last item
in the list but that is no longer the case in python 3 because of
dictionary order changes.

pavelib/utils/envs.py

@@ -281,7 +281,7 @@ class Env(object):
         """
         django_setting_value = cls.get_django_setting(django_setting, system, settings)
         pattern = re.compile(
-            u"[\"']{setting}[\"']: [\"'](?P<setting_value>.*)[\"']".format(setting=nested_django_setting)
+            u"[\"']{setting}[\"']: [\"'](?P<setting_value>.*?)[\"']".format(setting=nested_django_setting)
         )
         match = pattern.search(django_setting_value)
         if match: