Add default policies for Ironic

PROD-34908

Change-Id: I0dc31646deaa67991d334bb0d3f0118ad1104018
diff --git a/defaults/openstack/policy/ironic.yml b/defaults/openstack/policy/ironic.yml
new file mode 100644
index 0000000..f6addcb
--- /dev/null
+++ b/defaults/openstack/policy/ironic.yml
@@ -0,0 +1,6 @@
+classes:
+- system.defaults.openstack.policy.all
+parameters:
+  ironic:
+    api:
+      policy: ${_param:ironic_default_policy_${_param:openstack_version}}