Cleanup multi-line disk-image-create commands
Cleanup multi-line disk-image-create commands

This commit moves the disk-image-create comand lines into a more
readable multi-line syntax.

Change-Id: Ic8a839a81de5bba1d3e0fd56510f9e5b433728eb

stackforge/akanda-rug,stackforge/akanda-rug,openstack/akanda-rug,openstack/akanda-rug