[ONOS-8152] Adding new event in NetconfDeviceListener for netconf connection re-establishment after idle-timeout/session close received from device

Change-Id: I13f9ba181a0512b7496b76c04df67d38a9cea7df
diff --git a/protocols/netconf/ctl/src/main/java/org/onosproject/netconf/ctl/impl/NetconfControllerImpl.java b/protocols/netconf/ctl/src/main/java/org/onosproject/netconf/ctl/impl/NetconfControllerImpl.java
index 51e8913..cbf12f4 100644
--- a/protocols/netconf/ctl/src/main/java/org/onosproject/netconf/ctl/impl/NetconfControllerImpl.java
+++ b/protocols/netconf/ctl/src/main/java/org/onosproject/netconf/ctl/impl/NetconfControllerImpl.java
@@ -815,6 +815,9 @@
                         if (device != null) {
                             device.getSession().checkAndReestablish();
                             log.info("Connection with device {} was reestablished", did);
+                            for (NetconfDeviceListener l : netconfDeviceListeners) {
+                                l.netconfConnectionReestablished(did);
+                            }
                         } else {
                             log.warn("The device {} is not in the system", did);
                         }