Add ipmitool dep.

Change-Id: I322be5fa7ae196703bae5627a7ca2b65c673c7f1
diff --git a/maas/map.jinja b/maas/map.jinja
index 6a0a201..0671435 100644
--- a/maas/map.jinja
+++ b/maas/map.jinja
@@ -3,6 +3,7 @@
 Debian:
   pkgs:
   - maas-rack-controller
+  - ipmitool
   services:
   - maas-rackd
 {%- endload %}