Explicitly define keystone user and group
Explicitly define keystone user and group

The packages that I am using do not create a 
keystone group. It instead belongs to a group called
ssh-cert which is kind  of confusing.

This commit explicitly creates that group

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