Move internal classes under .impl package (1/2)

Change-Id: I72ed933ecd5ae7ffb268967f80fb395e90f7d8e9
diff --git a/protocols/netconf/api/src/main/java/org/onosproject/netconf/NetconfDeviceInfo.java b/protocols/netconf/api/src/main/java/org/onosproject/netconf/NetconfDeviceInfo.java
index be76056..8ff65bf 100644
--- a/protocols/netconf/api/src/main/java/org/onosproject/netconf/NetconfDeviceInfo.java
+++ b/protocols/netconf/api/src/main/java/org/onosproject/netconf/NetconfDeviceInfo.java
@@ -41,6 +41,7 @@
     private int port;
     private char[] key;
     //File keyFile @deprecated 1.9.0
+    @Deprecated
     private File keyFile;
     private DeviceId deviceId;
 
@@ -121,7 +122,7 @@
     /**
      * Exposes the port of the controller.
      *
-     * @return int port address
+     * @return port number
      */
     public int port() {
         return port;