Upgrade to Apache Karaf 4.2.8

Change-Id: I8ae525e6c8a04c0381c5e3bac39de1a7b85b4446
diff --git a/tools/package/bin/onos-restore b/tools/package/bin/onos-restore
index 9ba23f4..3b1f8bf 100755
--- a/tools/package/bin/onos-restore
+++ b/tools/package/bin/onos-restore
@@ -5,7 +5,7 @@
 
 ONOS_HOME=${ONOS_HOME:-$(cd $(dirname $0)/.. >/dev/null 2>&1 && pwd)}
 ONOS_DEFAULT_ARCHIVE=$(dirname $ONOS_HOME)/onos-data.tar.gz
-ONOS_KARAF=$ONOS_HOME/apache-karaf-4.2.6
+ONOS_KARAF=$ONOS_HOME/apache-karaf-4.2.8
 
 # Fetch the name of the archive or use a default if none is specified
 archive=${1:-$ONOS_DEFAULT_ARCHIVE}