neutron_plugin_configure_dhcp_agent invalid config file

ADD dhcp config file name for neutron_plugin_configure_dhcp_agent

Change-Id: I6578bcb40c4df2231c0b54f231ac3b78ede5a71d
Closes-Bug: #1598745
diff --git a/lib/neutron-legacy b/lib/neutron-legacy
index dca2e98..3a1bc64 100644
--- a/lib/neutron-legacy
+++ b/lib/neutron-legacy
@@ -817,7 +817,7 @@
 
     _neutron_setup_interface_driver $Q_DHCP_CONF_FILE
 
-    neutron_plugin_configure_dhcp_agent
+    neutron_plugin_configure_dhcp_agent $Q_DHCP_CONF_FILE
 }