ACTIVEMQ6-35 - expose web server configuration

https://issues.apache.org/jira/browse/ACTIVEMQ6-35

Added configuration to allow a web server (or any external component) to be deployed. Added a default Jetty configuration and implementation.
ACTIVEMQ6-15 - expose Jolokia in web server

https://issues.apache.org/jira/browse/ACTIVEMQ6-15

The Jolokia War Agent is now bootstrapped with the server so mBeans are accessible via Rest API's