Since we're looking at flattening the services into a deployment/
folder, we need to update the validation script to also handle this
directory structure. Additionally this change updates the service name
validation to ensure that the service name in matches the start of the
filename itself.
Change-Id: Ibb140a38b69a8780adf69362e0f437b3426f360d
Related-Blueprint: service-yaml-flattening