Revert "Only perform fencing duties on primary"

This reverts commit 464c69aac6.

Actually, yea, this made sense - if the primary fails, it can't
fence itself.

node-daemon/pvcd/Daemon.py

@@ -1120,8 +1120,7 @@ def update_zookeeper():
         # Close the Libvirt connection
         lv_conn.close()
 
-    # Look for dead nodes and fence them (primary only)
-    if this_node.router_state == 'primary'
+    # Look for dead nodes and fence them
     if debug:
         print("Look for dead nodes and fence them")
     if config['daemon_mode'] == 'coordinator':