Eliminating use of Apache Karaf CLI client and of ONOS_USE_SSH env. variable.

All CLI access is now through the raw SSH client.
To enable passwordless access, the 'onos-user-key' tool should be used to add user keys.
Added 'onos-user-password' tool in the similar vein and usage as the 'onos-user-key' tool.

Change-Id: Ic5482fc8012369edc818691402ba45d13f130452
diff --git a/tools/package/onos-run-karaf b/tools/package/onos-run-karaf
index f27428e..3f369a3 100755
--- a/tools/package/onos-run-karaf
+++ b/tools/package/onos-run-karaf
@@ -48,10 +48,9 @@
     export ONOS_HOME=$PWD
 
     # Run using the secure SSH client
-    export ONOS_USE_SSH=true
     [ ! -f ~/.ssh/id_rsa.pub ] && ssh-keygen -t rsa -f ~/.ssh/id_rsa -P '' -q
     $ONOS_HOME/bin/onos-user-key $(id -un) "$(cut -d\  -f2 ~/.ssh/id_rsa.pub)"
-    $ONOS_HOME/bin/onos-secure-ssh -u onos -p rocks
+    $ONOS_HOME/bin/onos-user-password onos rocks
 
     # Create config/cluster.json (cluster metadata)
     IP=${ONOS_IP:-127.0.0.1}
@@ -80,7 +79,7 @@
 
 function killServer() {
     echo "Killing ONOS server..."
-    kill -9 $(cat /tmp/onos.pid) 2>/dev/null
+    cat /tmp/onos.pid | xargs kill -9
 }
 
 # Hang-on a bit and then start tailing the ONOS log output