Added support for multisite OpenStack VIM feature through a new
'nfvo' extension. This also enables remote VNF life cycle manage-
ment through the VIM Id parameter.
Implements: blueprint multi-site-vim
Depends-On: I3c08945f24343288c2c5614ab4b472d68a1e1d47
Change-Id: I7dd19a0c1ce948474bb3069073b3608ce265beb4
0fdd5a4717