At the moment the Neutron network UUID is the same as the NSX
logical switch ID. This has a number of problems:
1. When we create a network we have two back end calls
2. We do not have a upgrade path from MH -> V3
We can only change the way in which we work when we have the code
in Nova changed so that the VC driver attaches to the correct
switch. At the moment that only works if the network UUID is the
same as the NSX one. This patch will enable us to do that.
Change-Id: Iea09105912f2a8d8766f02e71b45163e233a0eac
2f86e5be08