Reorganize tests literals and move then to their respective apps.

mayan/apps/sources/tests/test_models.py

@@ -3,18 +3,20 @@ from __future__ import unicode_literals
 import shutil
 import tempfile
 
-from django.contrib.auth.models import User
+from django.contrib.auth import get_user_model
 from django.core.files.base import File
 from django.test import TestCase, override_settings
 from django.test.client import Client
 
 from documents.models import Document, DocumentType
 from documents.tests import (
-    TEST_ADMIN_PASSWORD, TEST_ADMIN_USERNAME, TEST_ADMIN_EMAIL,
     TEST_COMPRESSED_DOCUMENT_PATH, TEST_DOCUMENT_TYPE,
     TEST_NON_ASCII_DOCUMENT_FILENAME, TEST_NON_ASCII_DOCUMENT_PATH,
     TEST_NON_ASCII_COMPRESSED_DOCUMENT_PATH
 )
+from user_management.tests import (
+    TEST_ADMIN_EMAIL, TEST_ADMIN_PASSWORD, TEST_ADMIN_USERNAME
+)
 
 from ..literals import SOURCE_UNCOMPRESS_CHOICE_Y
 from ..models import WatchFolderSource, WebFormSource
@@ -31,7 +33,7 @@ class UploadDocumentTestCase(TestCase):
             label=TEST_DOCUMENT_TYPE
         )
 
-        self.admin_user = User.objects.create_superuser(
+        self.admin_user = get_user_model().objects.create_superuser(
             username=TEST_ADMIN_USERNAME, email=TEST_ADMIN_EMAIL,
             password=TEST_ADMIN_PASSWORD
         )