This patch fixes Jinja2 syntax error in ironic.conf.j2.
All kolla-kubernetes configurations was recently removed by [1], but the
commit overlooked to remove a '{% endif %}' statement in ironic.conf.j2.
[1] cacf08f0a6d009301f28c6723f399fb8c1daf267
Change-Id: I115fedfd026f14409b62f9552ff401956909f8a8
Closes-Bug: #1706230