[#6226] Added missing indexes for project_id for purge script

Signed-off-by: Cory Johns <cjohns@slashdotmedia.com>
diff --git a/Allura/allura/model/notification.py b/Allura/allura/model/notification.py
index 6326bcc..3c3517f 100644
--- a/Allura/allura/model/notification.py
+++ b/Allura/allura/model/notification.py
@@ -69,6 +69,7 @@
     class __mongometa__:
         session = main_orm_session
         name = 'notification'
+        indexes = ['project_id']
 
     _id = FieldProperty(str, if_missing=h.gen_message_id)
 
diff --git a/ForgeChat/forgechat/model/chat.py b/ForgeChat/forgechat/model/chat.py
index 0035946..a81f0f9 100644
--- a/ForgeChat/forgechat/model/chat.py
+++ b/ForgeChat/forgechat/model/chat.py
@@ -28,6 +28,7 @@
     class __mongometa__:
         name = 'globals'
         session = M.main_orm_session
+        indexes  ['project_id']
         unique_indexes = [ 'channel' ]
 
     _id = FieldProperty(S.ObjectId)