
When the volume_id is in the path for an API, it is required. This fixes the volume_id_1 parameter for the path argument by making it required and also renaming it to be more clear of what it's used for. And finally, this fixes the os-attach parameter to indicate volume_id is in the path and is required, not optional. Change-Id: I0e8868d35b5ea06ef809c896f943d92ad8e71e3e