Update version for Liberty
Update version for Liberty

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

Change-Id: I3c04247f096c63c63d5c8fce1f0d955bcbc620e7
Signed-off-by: Kyle Mestery <9cfbda34e625c7b0454bcb19a48d07c46f9097d2@mestery.com>

openstack/octavia,openstack/octavia,openstack/octavia