NetconfSession refactoring

- Move netconf rpc envelope processing common across secure transport implementation
  to AbstractNetconfSession
  work by: Palash Kala <palash.kala@samsung.com>

Change-Id: I5f0d6adecf6224ae44f224291f645725b3c87739
diff --git a/apps/configsync-netconf/src/test/java/org/onosproject/d/config/sync/impl/netconf/NetconfDeviceConfigSynchronizerProviderTest.java b/apps/configsync-netconf/src/test/java/org/onosproject/d/config/sync/impl/netconf/NetconfDeviceConfigSynchronizerProviderTest.java
index 1aa3411..8851cf1 100644
--- a/apps/configsync-netconf/src/test/java/org/onosproject/d/config/sync/impl/netconf/NetconfDeviceConfigSynchronizerProviderTest.java
+++ b/apps/configsync-netconf/src/test/java/org/onosproject/d/config/sync/impl/netconf/NetconfDeviceConfigSynchronizerProviderTest.java
@@ -293,7 +293,7 @@
      */
     private class TestEditNetconfSession extends NetconfSessionAdapter {
         @Override
-        public CompletableFuture<String> request(String request)
+        public CompletableFuture<String> rpc(String request)
                 throws NetconfException {
             System.out.println("TestEditNetconfSession received:");
             System.out.println(XmlString.prettifyXml(request));