migration fixups

make this data fix postdeploy, and avoid find_in_batches issues
also remove :concurrently from a index created transactionally (on a new table)

Change-Id: If9744e13b2387eb1a310f19629fff6327000add5
Reviewed-on: https://gerrit.instructure.com/19834
Reviewed-by: Cody Cutrer <cody@instructure.com>
Reviewed-by: Bracken Mosbacker <bracken@instructure.com>
Reviewed-by: James Williams  <jamesw@instructure.com>
Tested-by: Jenkins <jenkins@instructure.com>
Product-Review: Brian Palmer <brianp@instructure.com>
QA-Review: Brian Palmer <brianp@instructure.com>

db/migrate/20130215164701_add_manage_rubrics_permission.rb

@@ -1,5 +1,5 @@
 class AddManageRubricsPermission < ActiveRecord::Migration
-  tag :predeploy
+  tag :postdeploy
 
   def self.up
     DataFixup::CopyRoleOverrides.send_later_if_production_enqueue_args(:run,

db/migrate/20130313141722_create_migration_issues.rb

@@ -14,7 +14,7 @@ class CreateMigrationIssues < ActiveRecord::Migration
 
       t.timestamps
     end
-    add_index :migration_issues, :content_migration_id, :concurrently => true
+    add_index :migration_issues, :content_migration_id
   end
 
   def self.down

lib/data_fixup/copy_role_overrides.rb

@@ -1,6 +1,7 @@
 module DataFixup::CopyRoleOverrides
   def self.run(old_permission, new_permission)
     RoleOverride.where(:permission => old_permission.to_s).find_in_batches do |old_role_overrides|
+      RoleOverride.send(:with_exclusive_scope) do
         possible_new_role_overrides = RoleOverride.find(:all, :conditions =>
           {:permission => new_permission.to_s, :context_id => old_role_overrides.map(&:context_id)} )
 
@@ -22,3 +23,4 @@ module DataFixup::CopyRoleOverrides
       end
     end
   end
+end