Correct VERSION of NetworkRequest

The VERSION of the nova.objects.NetworkRequest object was incorrectly
still at 1.0, even though a 1.1 version had been incremented previously
that added a pci_request_id field to the object.  According to Dan on
IRC, there's no danger here, but this is good to clean up regardless.

From Dan: "the only case where you'd have an issue is if you had a
conductor with the changeset before pci_request was added, and a compute
running the code after"

Change-Id: I3d8c1ac22fb50f25cee03bb230fccad2b18deaf5
Closes-bug: #1378461
Merge "Correct VERSION of NetworkRequest"