Merge branch 'approvers_fix' into 'master'

Remove invalid approvers records

https://gitlab.com/gitlab-org/gitlab-ee/issues/1

First part of fix

See merge request !467

db/migrate/20150731200022_remove_invalid_approvers.rb

+class RemoveInvalidApprovers < ActiveRecord::Migration
+  def up
+    execute("DELETE FROM approvers WHERE user_id = 0")
+  end
+
+  def down
+  end
+end

db/schema.rb

@@ -11,7 +11,7 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema.define(version: 20150717155058) do
+ActiveRecord::Schema.define(version: 20150731200022) do
 
   # These are extensions that must be enabled in order to support this database
   enable_extension "plpgsql"