Switch to full app paths

Instead of inserting the path of the apps into the Python app,
the apps are now referenced by their full import path.

This solves name clashes with external or native Python libraries.
Example: Mayan statistics app vs. Python new statistics library.

Every app reference is now prepended with 'mayan.apps'.

Existing config.yml files need to be updated manually.

Signed-off-by: Roberto Rosario <roberto.rosario.gonzalez@gmail.com>

mayan/apps/authentication/apps.py

@@ -4,8 +4,8 @@ import logging
 
 from django.utils.translation import ugettext_lazy as _
 
-from common import MayanAppConfig, menu_user
-from navigation.classes import Separator
+from mayan.apps.common import MayanAppConfig, menu_user
+from mayan.apps.navigation.classes import Separator
 
 from .links import link_logout, link_password_change
 
@@ -13,8 +13,10 @@ logger = logging.getLogger(__name__)
 
 
 class AuthenticationApp(MayanAppConfig):
+    app_namespace = 'authentication'
+    app_url = 'authentication'
     has_tests = True
-    name = 'authentication'
+    name = 'mayan.apps.authentication'
     verbose_name = _('Authentication')
 
     def ready(self):