Add global "push" policy to Repositories

Summary: No editing or view yet, just adds the schema and a policy default. Part of D7391.

Test Plan: `bin/storage upgrade`

Reviewers: hach-que, btrahan

Reviewed By: hach-que

CC: aran

Maniphest Tasks: T2230

Differential Revision: https://secure.phabricator.com/D7415

resources/sql/patches/20131025.repopush.sql

@@ -0,0 +1,5 @@
+ALTER TABLE {$NAMESPACE}_repository.repository
+  ADD COLUMN pushPolicy VARCHAR(64) NOT NULL COLLATE utf8_bin;
+
+UPDATE {$NAMESPACE}_repository.repository
+  SET pushPolicy = 'users' WHERE pushPolicy = '';