RAVE-901: Move database access to container provided JNDI resource
- database access configuration now is defined in the project pom.xml, customizable there or on a child pom if needed
- JNDI resources for both Rave Shindig and Rave Portal are injected in the Tomcat global context.xml

git-svn-id: https://svn.apache.org/repos/asf/rave/trunk@1450506 13f79535-47bb-0310-9956-ffa450edef68