PUBAPI-617: Documented machine.dataset can be an UUID instead of URN when image lacks of URN
PUBAPI-617: Documented machine.dataset can be an UUID instead of URN when image lacks of URN

joyent/sdc-cloudapi,arekinath/sdc-cloudapi,misterbisson/sdc-cloudapi,KrisShannon/sdc-cloudapi,arekinath/sdc-cloudapi,joyent/sdc-cloudapi,misterbisson/sdc-cloudapi,KrisShannon/sdc-cloudapi