Convert to Groovy Back-end

* Groovy EJBs are annotated with @LocalBean (see [this](https://github.com/wildfly/wildfly/pull/4777#issuecomment-22286670))
* The JMS invocation was removed to simplify the example and be able to run on TomEE + JAX-RS
* Changed fr.insalyon.telecom.* namespaces to a more neutral foo.bar.*
* Works OOTB on JBoss AS 7.1.1, WilfFly 8.0 Beta1 and TomEE 1.5.2 + JAX-RS (which [requires a web.xml](https://issues.apache.org/jira/browse/TOMEE-1078))
* *Does not work* on GlassFish (it doesn't like the @LocalBean annotation on Groovy classes) :/

Signed-off-by: Fred Bricon <fbricon@gmail.com>