Upgrade karaf to version 4.2.14

Change-Id: Ibfa72941a01fb8026513d39f5b3d5f2bb3dcc9d2
diff --git a/tools/package/onos-prep-karaf b/tools/package/onos-prep-karaf
index c707206..f81634b 100755
--- a/tools/package/onos-prep-karaf
+++ b/tools/package/onos-prep-karaf
@@ -13,7 +13,7 @@
 LOG4J2_EXTRA=$6
 SANDBOX=${7:-.}
 
-KARAF_VERSION="4.2.9"
+KARAF_VERSION="4.2.14"
 ONOS_SECURITY_MODE="false"
 
 PREFIX="onos-$ONOS_VERSION"