Explicitly include versioninfo in tarball.
Explicitly include versioninfo in tarball.

The most recent sync of openstack-common setup.py/version.py code
seems to have cause quantum/versioninfo to disappear from the tarball.
(see git commit d65bca8)

This updates MANIFEST.in to explicitly include that file and seems
to resolve the issue.

Fixes LP Bug #1077035.

Change-Id: I5fb395c15ea998da00b11e66947d1b1ea3665ea0

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