nova with nova-novncproxy was requested by Dima Ukov

Conflicts:
	crowbar.yml
no more vncproxy for u
install nova-novncproxy package and run service

Conflicts:
	chef/cookbooks/nova/recipes/vncproxy.rb
few fixes within nova-compute part
Merge branch 'bug/vnc/pebbles/master' into task/DCB-92/pebbles/master