Support Storage Policy - Rev 3

* Functional tests now run in SAIO+SoF setup.
* Fix and update various constraints.
* Update object-server.conf, swift.conf files. Add test.conf file.
* Added ./.functests script

TODO:
* Reintroduce gluster_swift_tests.py with SoF
  specific functional tests.

Signed-off-by: Prashanth Pai <ppai@redhat.com>