Add Ironic to setup-clienttools

Ironic has pushed its first client release to Pypi. This patch adds
Ironic to the client tools installed by setup-clienttools. This will
integrate Ironic more closely with the TripleO story and allow Ironic
Dev's to follow the devtest script with less deviation.

Also add scripts/ironic to .gitignore file.

Change-Id: Ib384c31a9b5c328f58040da77f507cc84b055be4