"sync create" Sync Resources from One region to other.
"sync list" List Sync Jobs.
"sync show" List the details of a Sync Job.
"sync delete" Delete Sync Job(s) details from the database.
Add test-cases for the same.
Python-kingbirdclient is now a part of openstack/requirements.
https://review.openstack.org/#/c/428793/.
So updated tox.ini to pick requirements from openstack/requirements
directly rather than using install _ commands.
Also added tox_install.sh script
Closes-Bug: #1666453
Change-Id: I587070a7175ea0651def5630c2d9890a175feb0a