Updated openstack/openstack
Project: openstack-dev/devstack  92b400fd6383d5182bc196e1a33f89b3c5e42723
null
change the vmdk to the one used in VMWare ci

The debian image that defaults to being using with vmware is huge,
and it turns out it's not actually used in VMWare ci so we don't
really know if it's working. Instead use the vmdk that is used
in VMWare ci, which we know will boot, as we get results everyday.

Change-Id: I014746af293852525e2bd128c4d19f5889ecd55d