[ONOS-5585] CopyConfig() of NETCONF driver generates malformed RPC request

Change-Id: Iaceaf5c44f361a0c9b1945a869d881c81d0c9d37
diff --git a/protocols/netconf/ctl/src/main/java/org/onosproject/netconf/ctl/NetconfSessionImpl.java b/protocols/netconf/ctl/src/main/java/org/onosproject/netconf/ctl/NetconfSessionImpl.java
index 9ae5acc..4effb4b 100644
--- a/protocols/netconf/ctl/src/main/java/org/onosproject/netconf/ctl/NetconfSessionImpl.java
+++ b/protocols/netconf/ctl/src/main/java/org/onosproject/netconf/ctl/NetconfSessionImpl.java
@@ -447,7 +447,7 @@
         rpc.append("<").append(targetConfiguration).append("/>");
         rpc.append("</target>");
         rpc.append("<source>");
-        rpc.append("<").append(newConfiguration).append("/>");
+        rpc.append(newConfiguration);
         rpc.append("</source>");
         rpc.append("</copy-config>");
         rpc.append("</rpc>");