Ensure that Mysql is installed before service is started.
Ensure that Mysql is installed before service is started.

This commit creates a conditional dependency that the keystone
db should be setup before the service is started.

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