Global object's location  to enable GZIP in Java

Reference to Global Java object for easy lookup.
log http wire

the http packets are logs when:
- the application is started with -Dhttp.netty.log.wire=true
- the org.jboss.netty.handler.logging.LoggingHandler logger
  is set to DEBUG
Jackson upgrade
Merge pull request #3665 from mkurz/jacksonUpgrade

Jackson upgrade
Merge pull request #3635 from arifchishti/master

Global object's location  to enable GZIP in Java
Merge pull request #3625 from yanns/logwire

log http wire