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/navigation/classes.py

@@ -15,8 +15,8 @@ from django.template.defaulttags import URLNode
 from django.urls import Resolver404, resolve
 from django.utils.encoding import force_str, force_text
 
-from common.utils import return_attrib
-from permissions import Permission
+from mayan.apps.common.utils import return_attrib
+from mayan.apps.permissions import Permission
 
 logger = logging.getLogger(__name__)