Modified the v3 composite based on the discussion with the team

* Dependant on pr: https://review.openstack.org/#/c/135339/
* Split the composite to include version specific composite and the base composite

Fixed the copyright conflict

Added the common composite and the tokens behavior for v3
* Added the init files with the copyright
* Added the composite for v3
* Added the tokens behavior for v3

Change-Id: If5be6fd41148628608e6e273dc8a94ff7df59fac