Removed version prefix from the endpoint urls

The service endpoint being registered in Keystone should not contain the version suffix,
as the different versions of an API should co-exist at the same endpoint

Partial-Bug: #1318794
Closes-Bug: #1320937
Change-Id: I853dfa30d1ad3538fad55826bb498dedae3e14f6
Merge "Removed version prefix from the endpoint urls"