Supports ControllerConfig behaviour for juniper.

Juniper drivers does not have ControllerConfig yet.

ONOS-7738

Change-Id: I2ecbb039e94266a87bb3d90a6949a49f092c194d
diff --git a/drivers/juniper/src/main/resources/juniper-drivers.xml b/drivers/juniper/src/main/resources/juniper-drivers.xml
index 74885c8..54faaff 100644
--- a/drivers/juniper/src/main/resources/juniper-drivers.xml
+++ b/drivers/juniper/src/main/resources/juniper-drivers.xml
@@ -23,5 +23,7 @@
                    impl="org.onosproject.drivers.juniper.FlowRuleJuniperImpl"/>
         <behaviour api="org.onosproject.net.behaviour.LinkDiscovery"
                    impl="org.onosproject.drivers.juniper.LinkDiscoveryJuniperImpl"/>
+        <behaviour api="org.onosproject.net.behaviour.ControllerConfig"
+                   impl="org.onosproject.drivers.juniper.ControllerConfigJuniperImpl"/>
     </driver>
 </drivers>