Bug 11897: Add Stock Rotation atomic update schema.

Bug 11897: Add Stock Rotation atomic update schema.

* installer/data/mysql/atomicupdate/stockrot_tables.sql: New file.
* installer/data/mysql/kohastructure.sql (stockrotationrotas)
  (stockrotationstages, stockrotationitems): New tables.
* installer/data/mysql/sysprefs.sql: Add Stockrotation sysprefs.
* installer/data/mysql/userflags.sql: Add Stockrotaiton userflag.
* installer/data/mysql/userpermissions.sql: Add Stockrotation
  userpermissions.
* koha-tmpl/intranet-tmpl/prog/en/modules/admin/preferences/circulation.pref:
  Add Stockrotation menu.

Signed-off-by: Kathleen Milne <kathleen.milne@cne-siar.gov.uk>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>
Signed-off-by: Nick Clemens <nick@bywatersolutions.com>