Fix typo NEUTON to NEUTRON

Fixes bug: #1269111

Change-Id: Icf66b4d474698b5f3ca22bc656ecd12d03164bce
diff --git a/lib/neutron_plugins/brocade b/lib/neutron_plugins/brocade
index f9275ca..8e18d04 100644
--- a/lib/neutron_plugins/brocade
+++ b/lib/neutron_plugins/brocade
@@ -38,7 +38,7 @@
 }
 
 function neutron_plugin_configure_plugin_agent() {
-    AGENT_BINARY="$NEUTON_BIN_DIR/neutron-linuxbridge-agent"
+    AGENT_BINARY="$NEUTRON_BIN_DIR/neutron-linuxbridge-agent"
 }
 
 function neutron_plugin_setup_interface_driver() {