Improve status script with new exit code

git-svn-id: https://svn.apache.org/repos/asf/karaf/trunk@1539298 13f79535-47bb-0310-9956-ffa450edef68
[KARAF-2547] Improve messages in status and stop scripts

git-svn-id: https://svn.apache.org/repos/asf/karaf/trunk@1539326 13f79535-47bb-0310-9956-ffa450edef68
[KARAF-2524] As we set JMX ACL as optional for 3.0.0, I removed it from the service wrapper

git-svn-id: https://svn.apache.org/repos/asf/karaf/trunk@1539349 13f79535-47bb-0310-9956-ffa450edef68