[WIP] Upgrade ONOS to karaf version 4.2.1

Change-Id: I7cd40c995bdf1c80f94b1895fb3344e32404c7fa
diff --git a/cli/src/main/java/org/onosproject/cli/AbstractChoicesCompleter.java b/cli/src/main/java/org/onosproject/cli/AbstractChoicesCompleter.java
index 5b5e808..4f1962c 100644
--- a/cli/src/main/java/org/onosproject/cli/AbstractChoicesCompleter.java
+++ b/cli/src/main/java/org/onosproject/cli/AbstractChoicesCompleter.java
@@ -15,7 +15,9 @@
  */
 package org.onosproject.cli;
 
-import org.apache.karaf.shell.console.completer.StringsCompleter;
+import org.apache.karaf.shell.api.console.CommandLine;
+import org.apache.karaf.shell.api.console.Session;
+import org.apache.karaf.shell.support.completers.StringsCompleter;
 
 import java.util.List;
 import java.util.SortedSet;
@@ -26,13 +28,17 @@
 public abstract class AbstractChoicesCompleter extends AbstractCompleter {
 
     protected abstract List<String> choices();
+    protected CommandLine commandLine;
+    protected Session session;
 
     @Override
-    public int complete(String buffer, int cursor, List<String> candidates) {
+    public int complete(Session session, CommandLine commandLine, List<String> candidates) {
+        this.session = session;
+        this.commandLine = commandLine;
         StringsCompleter delegate = new StringsCompleter();
         SortedSet<String> strings = delegate.getStrings();
         choices().forEach(strings::add);
-        return delegate.complete(buffer, cursor, candidates);
+        return delegate.complete(session, commandLine, candidates);
     }
 
 }