Use 'UUID', not 'uuid' in exception strings
Use 'UUID', not 'uuid' in exception strings

Use the grammatically correct 'UUID' (since it is an
abbreviation) in exception strings.

Change-Id: Ib840b649b6ba0a7ba8dc935be6f06b9d36bb87d7

NaohiroTamura/ironic,openstack/ironic,openstack/ironic,pshchelo/ironic,SauloAislan/ironic,NaohiroTamura/ironic,SauloAislan/ironic,pshchelo/ironic