Adding access key auth support for openstack V3

[DImuthuUpe]

Please refer to the discussion thread [1]

[1] https://lists.apache.org/thread/2p7qc20rn19r3yhsfd63p3o3h587f7oh

[smarru]

@gaul drawing your attention, can you please review and provide us feedback, we would like to use this in Apache Airavata

[gaul]

@DImuthuUpe Can we move forward with this or should I close it?

[gaul]

Please re-open if this is still relevant.

[edipdemirbilek]

@gaul I have run into the same issue. i wonder is this was ever fixed.