Remove configurability of the document and document signatures UUID function

mayan/apps/documents/models.py

@@ -6,6 +6,7 @@ import hashlib
 import logging
 import os
 import tempfile
+import uuid
 
 try:
     from cStringIO import StringIO
@@ -35,11 +36,12 @@ from .literals import (LANGUAGE_CHOICES, VERSION_UPDATE_MAJOR,
 from .managers import (DocumentManager, DocumentPageTransformationManager,
                        DocumentTypeManager, RecentDocumentManager)
 from .runtime import storage_backend
-from .settings import (CACHE_PATH, DISPLAY_SIZE, LANGUAGE, UUID_FUNCTION,
-                       ZOOM_MAX_LEVEL, ZOOM_MIN_LEVEL)
+from .settings import (CACHE_PATH, DISPLAY_SIZE, LANGUAGE, ZOOM_MAX_LEVEL,
+                       ZOOM_MIN_LEVEL)
 from .signals import post_version_upload, post_document_type_change
 
 HASH_FUNCTION = lambda x: hashlib.sha256(x).hexdigest()  # document image cache name hash function
+UUID_FUNCTION = lambda x: unicode(uuid.uuid4())
 logger = logging.getLogger(__name__)