Add a nova-multi-compute-hyperv role

This depends on the hyperv cookbook which is currently shipped
externally, as part of
https://github.com/cloudbase/barclamp-hyperv-compute
Do not use hyperv::set_time recipe

See https://github.com/cloudbase/barclamp-hyperv-compute/pull/11
Merge pull request #225 from vuntz/hyperv-support

https://github.com/crowbar/barclamp-nova/pull/225

Merged by devtool for rajinir