Add missing keystone user role for Heat
Add missing keystone user role for Heat

Role "heat_stack_user" should be present for
Heat template users.

Change-Id: I2c561031eb9a77df08b3db8ab4f2f3d95fd990ad
Closes-Bug: 1330877

huntxu/fuel-library,SmartInfrastructures/fuel-library-dev,huntxu/fuel-library,eayunstack/fuel-library,ddepaoli3/fuel-library-dev,xarses/fuel-library,ddepaoli3/fuel-library-dev,stackforge/fuel-library,huntxu/fuel-library,eayunstack/fuel-library,SmartInfrastructures/fuel-library-dev,eayunstack/fuel-library,stackforge/fuel-library,zhaochao/fuel-library,zhaochao/fuel-library,zhaochao/fuel-library,slystopad/fuel-lib,eayunstack/fuel-library,zhaochao/fuel-library,ddepaoli3/fuel-library-dev,slystopad/fuel-lib,huntxu/fuel-library,Metaswitch/fuel-library,SmartInfrastructures/fuel-library-dev,stackforge/fuel-library,ddepaoli3/fuel-library-dev,Metaswitch/fuel-library,xarses/fuel-library,xarses/fuel-library,Metaswitch/fuel-library,stackforge/fuel-library,xarses/fuel-library,SmartInfrastructures/fuel-library-dev,ddepaoli3/fuel-library-dev,SmartInfrastructures/fuel-library-dev,huntxu/fuel-library,Metaswitch/fuel-library,slystopad/fuel-lib,zhaochao/fuel-library,eayunstack/fuel-library,slystopad/fuel-lib