Updated ironic.headers and regenerated/updated the config tables
for ironic, using stable/kilo branch. Deleted tables that aren't
used by ironic (most likely due to some bug when generating these
with authohelp-wrapper having the venvs of all the OpenStack
projects).
I created and generated the config tables via
"./autohelp-wrapper -b stable/kilo create ironic" and
"./autohelp-wrapper -f docbook ironic".
Change-Id: I95644482b107a3f71962bc52618dcd5a6ff597af
9ac034a120