FELIX-3981 - Create a sample project for demonstrating Felix JAAS main features

Adding initial base skeleton comprising of couple of bundles. The app bundle exposes various servlets which demonstrates different ways of performing JAAS invocation

git-svn-id: https://svn.apache.org/repos/asf/felix/trunk@1459644 13f79535-47bb-0310-9956-ffa450edef68