Set Tempest feature flags for Ironic

Many features tested by Tempest are not relevant to baremetal deployments.
This sets compute-feature-enabled flags accordingly.

Change-Id: I8a1820946bfc5d8f8c25692f9db67df59506126e
Merge commit 'refs/changes/83/86083/2' of git://gold.eng.hq.xensource.com/git/github/openstack-dev/devstack into tmpbranch
Merge commit 'refs/changes/18/112018/1' of git://gold.eng.hq.xensource.com/git/github/openstack-dev/devstack into tmpbranch