CORD-391 - cleaned up ansible to pass cleanly through ansible-lint

Change-Id: I90284704255edc19abbdb239852c520a4bf48df4
diff --git a/roles/fabric-switch/tasks/ofdpa.yml b/roles/fabric-switch/tasks/ofdpa.yml
index 21af257..c1c0b37 100644
--- a/roles/fabric-switch/tasks/ofdpa.yml
+++ b/roles/fabric-switch/tasks/ofdpa.yml
@@ -39,7 +39,9 @@
 
 - name: Mark Persist Openflow Agent
   command: persist /etc/accton/ofdpa.conf
+  changed_when: true
 
 - name: Persist Openflow Agent
   command: savepersist
   failed_when: false
+  changed_when: true