Use servicemix-utils 1.6.0 instead of 1.7.0-SNAPSHOT

git-svn-id: https://svn.apache.org/repos/asf/servicemix/smx5/trunk@1453583 13f79535-47bb-0310-9956-ffa450edef68
SM-2173: Upgrade to Karaf 2.3.1

git-svn-id: https://svn.apache.org/repos/asf/servicemix/smx5/trunk@1453584 13f79535-47bb-0310-9956-ffa450edef68