Add 3 new web hooks inside "cloud_service_management_service.rb":

- create_deployment (based on microsoft doc at http://msdn.microsoft.com/en-us/library/azure/ee460813.aspx)
- upgrade_deployment (based on microsoft doc at http://msdn.microsoft.com/en-us/library/azure/ee460793.aspx)
- get_deployment (based on microsoft doc at http://msdn.microsoft.com/en-us/library/azure/ee460804.aspx)

For each of those methods, a unit test has been added inside the 'cloud_service_management_service_test.rb'