Updated to Play 2.3.4

https://groups.google.com/d/msg/play-framework/JgcmbvFJZRs/u-hBmGQUl_kJ
Updated to Play 2.3.4
Merge pull request #1077 from donovanmuller/master

Play2-Java: Version update
Add Lwan tests.

This patch adds Lwan web server alongside a benchmark that implements
all but one (database updates) tests.