use orbit jetty 6.1.23 and servlet api 2.5.0

Signed-off-by: Igor Fedorenko <igor@ifedorenko.com>
excluded jsr305 due to incompatible license

Signed-off-by: Igor Fedorenko <igor@ifedorenko.com>
add java version to http user-agent

need to a way to measure how many users who upgrade m2e run on
stale/outdated versions of java

Signed-off-by: Igor Fedorenko <igor@ifedorenko.com>
Merge tag 'releases/1.4/1.4.0.20130601-0317'