karyon admin console plugin framework

karyon admin supports a plugin framework that lets application developers write their own admin console pages that get included with 8077 (default port) tab views. 
This code change broadly contains -
1. plugin framework that scans for admin page definitions and includes corresponding freemarker templates, css, js and other jersey resources as part of admin bootstrap
2. existing pages (env, archaius, jars, eureka, jmx) are transformed to use plugin framework
3. tableViewResource framework to manage paginated, filtered and sorted table views. Its typically used with a client-side jquery dataTables view. TableViewResource is not integrated with properties page view which should handle thousands of archaius properties without sacrificing page load or response times.