LILY-1008 usel Kauri with other Jetty version

Upgrade to a Kauri version that makes use of a Restlet-Jetty connector based on mortbay jetty instead of eclipse jetty, aligned to use the same version as hadoop/cloudera does.
It is hoped that this will solve high-cpu usage as reported in tickets like:
http://jira.codehaus.org/secure/IssueNavigator.jspa?reset=true&jqlQuery=project+%3D+JETTY+AND+%28summary+~+fillinstacktrace+OR+description+~+fillinstacktrace+OR+comment+~+fillinstacktrace%29