Disable pxe_tftp systemd services during upgrade

Change-Id: I7a697c662c611c1319bb2b78a4a12045ffba73f3

deployment/ironic/ironic-pxe-container-puppet.yaml

@@ -104,6 +104,19 @@ outputs:
                 name: xinetd
                 state: restarted
               when: xinetd_active_result.rc == 0
+            - name: Check if ironic_pxe_tftp is enabled
+              command: systemctl is-enabled --quiet ironic_pxe_tftp
+              ignore_errors: True
+              register: ironic_pxe_tftp_enabled_result
+            - name: Set fact ironic_pxe_tftp_enabled
+              set_fact:
+                ironic_pxe_tftp_enabled: "{{ ironic_pxe_tftp_enabled_result.rc == 0 }}"
+        - name: Stop ironic_pxe_tftp service
+          when:
+            - step|int == 1
+            - ironic_pxe_tftp_enabled_result|bool
+          service: name=ironic_pxe_tftp state=stopped enabled=no
+
       docker_config:
         step_4:
           ironic_pxe_tftp: