Rename Neutron core/service plugins for VMware NSX
Rename Neutron core/service plugins for VMware NSX

Short aliases are introduced for the NSX plugin(s). This patch
also switches to using the new plugin names/naming scheme in
the unit tests.

Partial-implements blueprint: nicira-plugin-renaming

Change-Id: If1f1431b098bf77b9c85e0afb3d7848083d9d451

CiscoSystems/networking-cisco,hareeshpc/networking-cisco,openstack/networking-cisco,Gitweijie/first_project,nikolay-fedotov/networking-cisco,hareeshpc/networking-cisco,cisco-openstack/networking-cisco,Tehsmash/networking-cisco,cisco-openstack/networking-cisco,Gitweijie/first_project,openstack/networking-cisco,noironetworks/networking-cisco,noironetworks/networking-cisco,Tehsmash/networking-cisco,CiscoSystems/networking-cisco