Add sample credentials file
Add sample credentials file

bluemixgaragelondon/cf-blue-green-deploy,rrufus/cf-blue-green-deploy,matulko/cf-blue-green-deploy,bluemixgaragelondon/cf-blue-green-deploy,Samze/cf-blue-green-deploy,Samze/cf-blue-green-deploy,rrufus/cf-blue-green-deploy,matulko/cf-blue-green-deploy