Update version for Liberty
Update version for Liberty

Remove pre-version setting so we can rely on tags for Liberty
versioning.

Change-Id: Ib494118166228cc64d33a68d40d94510616dab9e
Signed-off-by: Kyle Mestery <9cfbda34e625c7b0454bcb19a48d07c46f9097d2@mestery.com>

Mirantis/vmware-dvs,ekosareva/networking-vsphere,VTabolin/networking-vsphere,stackforge/networking-vsphere,stackforge/networking-vsphere,ekosareva/networking-vsphere,openstack/networking-vsphere,ekosareva/vmware-dvs,Mirantis/vmware-dvs,openstack/networking-vsphere,ekosareva/vmware-dvs,VTabolin/networking-vsphere