Move the ironic-check action into prechecks.yml

Change-Id: Ia1fa141acd7233f0c9dd30dd3d13e31cf1a2fb8e

ansible/roles/neutron/tasks/deploy.yml

 ---
-- include_tasks: ironic-check.yml
-
 - include_tasks: register.yml
   when: inventory_hostname in groups['neutron-server']
 

ansible/roles/neutron/tasks/ironic-check.yml

----
-- fail: msg="Ironic must be enabled when using networking-baremetal/ironic-neutron-agent"
-  when:
-    - enable_ironic_neutron_agent | bool
-    - not (enable_ironic | bool)

ansible/roles/neutron/tasks/precheck.yml

@@ -57,3 +57,11 @@
   when:
     - (groups['inner-compute'] | default([]) | length > 0
        or groups['external-compute'] | default([]) | length > 0)
+
+- name: Checking whether Ironic enabled
+  local_action: fail msg="Ironic must be enabled when using networking-baremetal/ironic-neutron-agent"
+  changed_when: false
+  run_once: True
+  when:
+    - enable_ironic_neutron_agent | bool
+    - not (enable_ironic | bool)