Update provision module to use new lock server

Signed-off-by: Zack Cerza <zack.cerza@inktank.com>
Reflect updated field names

Signed-off-by: Zack Cerza <zack.cerza@inktank.com>
Don't dump all vm_host details when listing

Signed-off-by: Zack Cerza <zack.cerza@inktank.com>
Use new vm_host attribute

Signed-off-by: Zack Cerza <zack.cerza@inktank.com>