pom.xml: don't add the test-jar goal in submodules

test jars are now automatically generated, as specified in the parent
pom.

Signed-off-by: Pierre-Alexandre Meyer <pierre@ning.com>
server: various fixes

* Fix the wiring to handle only REST APIs via Jersey
* Add welcome page and favicon
* Fix the jetty:run goal configuration to use the jetty xml config

Signed-off-by: Pierre-Alexandre Meyer <pierre@ning.com>