Fixes#2978 - Add module-info to relevant Jetty modules.
Added module-info.java for Jetty modules that are not test modules.
Moved jetty-http test utility classes to new module "jetty-http-tools".
Removed generation of test-jar from websocket-core.
Signed-off-by: Simone Bordet <simone.bordet@gmail.com>
Simone Bordet