* class file java version check wrt maven config
* Recommiting the jars built with updated java version
* Updating encoding for demo as well for consistency
Normally it is not a good idea to place <version> constraints in the
definition of plugins in pom.xml unless a specific version really is
needed.
This patch removes the constraints.
There are various benefits to this, one of them is that it will always
build with the latest packaged version of the plugins on a Debian or
Ubuntu system.
Author: daniel@pocock.proR=jia.shao.peng@gmail.com
BUG=
Review URL: https://codereview.appspot.com/122480043