Implement two deployment actions:
* python-vmware-nsx (contains Neutron NSX plugin) installation
* pass UI parameters into nsx.ini file
Plugin contains custom type `nsx_config' to configure settings in
nsx.ini file.
Plugin reuses network:neutron:core:nsx component due to a hardcoded
restriction in fuel UI. This makes impossible simultaneous usage of
NSX-T and NSXv plugins.
Change-Id: I963a9a8c1d5d8c27324bf01a6ae10be23075f413