Add a default value for messageCount so writes from old tiers survive the

update query

Auditors: chad

Author: epriestley

resources/sql/autopatches/20160919.repo.messagedefault.sql

@@ -0,0 +1,2 @@
+ALTER TABLE {$NAMESPACE}_repository.repository_statusmessage
+  CHANGE messageCount messageCount INT UNSIGNED NOT NULL DEFAULT 0;