ironic-conductor: update driver dependencies for Queens
ironic-conductor: update driver dependencies for Queens

* Added python-sushy for CentOS/RHEL for the redfish driver
  (introduced in the Pike release).
* Added ansible and systemd-python for ansible driver
  (introduced in the Queens cycle).
* Added python-scciclient as it was packaged for CentOS/RHEL.
* Removed seamicroclient, pyghmi and pyremotevbox as the
  corresponding drivers were removed.
* Removed wsman as no drivers use it any more: the AMT driver
  was removed, the iDrac driver switched to python-dracclient.

Most of removals happened as part of the Ocata driver cleanup:
https://docs.openstack.org/releasenotes/ironic/ocata.html#id9

Change-Id: I8774a45bb1cfcdf5c3b675e235fb074af4a9646c

nihilifer/kolla,openstack/kolla,rahulunair/kolla,stackforge/kolla,rahulunair/kolla,stackforge/kolla,openstack/kolla,nihilifer/kolla,stackforge/kolla