Fail to import instackenv.json when pxe_ilo is an enabled driver in Red Hat OpenStack 8

Issue

• ironic driver-list is empty during installation
• pxe_ilo does not work
• unable to import instackenv.json

[stack@rdirector ~]$ openstack baremetal import --json ~/instackenv.json
Request returned failure status.
No valid host was found. Reason: No conductor service registered which supports driver pxe_ilo. (HTTP 400)

• /var/log/ironic/ironic-api.log

2016-06-13 14:41:35.893 45391 DEBUG wsme.api [req-a3565b35-da10-4cc9-b003-64a21a48daa1 ] Client-side error: No valid host was found. Reason: No conductor service registered which supports driver pxe_ilo. format_exception /usr/lib/python2.7/site-packages/wsme/api.py:221

• ironic driver-list shows no drivers installed

[stack@rh-director ~]$ ironic driver-list
+---------------------+----------------+
| Supported driver(s) | Active host(s) |
+---------------------+----------------+
+---------------------+----------------+