remove underdeveloped integration/vm_spec.rb -- requires manual steps, and tests within are covered by vapp_spec
move utility script vcloud-vapp-delete into new utils/ dir, to highlight that this is an unstable tool
update metadata feature to update vApp metadata with duplicate information to the VM metadata.

this is implemented in a way I am not particularly happy with, and some metadata is likely not vapp specfic. However, with our VM-vApp coupling assumption (1 vm per vapp) this is not an awful idea, and is "good enough for this release"