Fixing Netconf Subscription session reopen

Change-Id: I908b75f7c2a697451d0c876684db5abc5a2d1c36
diff --git a/protocols/netconf/ctl/src/main/java/org/onosproject/netconf/ctl/impl/NetconfSessionMinaImpl.java b/protocols/netconf/ctl/src/main/java/org/onosproject/netconf/ctl/impl/NetconfSessionMinaImpl.java
index 6d30314..c619e5d 100644
--- a/protocols/netconf/ctl/src/main/java/org/onosproject/netconf/ctl/impl/NetconfSessionMinaImpl.java
+++ b/protocols/netconf/ctl/src/main/java/org/onosproject/netconf/ctl/impl/NetconfSessionMinaImpl.java
@@ -400,6 +400,8 @@
                 log.debug("Trying to reopen the channel with {}", deviceInfo.getDeviceId());
                 cleanUp();
                 openChannel();
+            } else {
+                return;
             }
             if (subscriptionConnected) {
                 log.debug("Restarting subscription with {}", deviceInfo.getDeviceId());