Backport ACL computation improvements

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

mayan/apps/permissions/classes.py

@@ -73,7 +73,8 @@ class Permission(object):
             )
 
     @classmethod
-    def check_permissions(cls, permissions, user):
+    def check_user_permissions(cls, permissions, user):
+        # TODO: Remove list check. Add permissions arguments will be lists.
         try:
             for permission in permissions:
                 if permission.stored_permission.user_has_this(user=user):