[RI1][RC1] Add swift testing in Functest

[collivier]

Integrating swift testing in Functest would be an added value for CNTT (RI1 and RC1).
It will help improving swift coverage.
https://github.com/openstack/swift/tree/master/test

[jayacha]

waiting for help from CNTT (Requesting for resources),

[jayacha]

@collivier requesting to add additional swift tests for additional coverage of the requirements to improve the test coverage (related to RA1 ch5 section5.2.4 swift). this issues not related to Airship 39/40/41. also Recommending to add functest to the agenda for the next cross community meetings and request for volunteers and developers.