Move signal handlers into their own app module

mayan/apps/document_indexing/handlers.py

@@ -0,0 +1,15 @@
+from __future__ import unicode_literals
+
+from .tasks import task_delete_empty_index_nodes, task_index_document
+
+
+def document_index_delete(sender, **kwargs):
+    task_delete_empty_index_nodes.apply_async(queue='indexing')
+
+
+def document_metadata_index_update(sender, **kwargs):
+    task_index_document.apply_async(kwargs=dict(document_id=kwargs['instance'].document.pk), queue='indexing')
+
+
+def document_metadata_index_post_delete(sender, **kwargs):
+    task_index_document.apply_async(kwargs=dict(document_id=kwargs['instance'].document.pk), queue='indexing')