Change-Id: I4bc7ea354489b54386303ff4f956c86eb953e3b8

It is only used to populate the list of supported Session options.
Use openstacksdk to create a session with all arguments instead.
Since it's already a dependency of osc-lib, this changes adds no
new dependencies, while substantially simplifying the code.

Change-Id: I6100f94c18cbf3e90d4a6d3ec2a3fc74ebea53a5

To provide a `baremetal introspection` CLI interface similar to the
existing OSC plugin, this change adds optional support for pulling
commands from ironic-inspector-client.

Change-Id: I61b82af3afdd934ed130d3d700de8ec7423a1328

In an ideal world we would have all messages translated to at least major
languages. In reality, ironic has never boasted a great set of translation,
and according to Zanata only 2.94% of messages are translated for ironic
in Train (1.33% for ironic-inspector). Given that ironic-python-agent is
not translated at all, using i18n by default seems an overkill.

Change-Id: I30d0f5ae6c7428ebbf018e14a3b78c430681c6a6

This changes adds a new command ``baremetal`` that works mostly like
the OSC ``openstack baremetal`` command but does not require OSC and
defaults to no-auth. No changes in existing commands are required,
the existing OSC plugins are pulled in.

Change-Id: Id4895ec37bfb58eb635e5c8519f96f1bdc30c925