Move hbase and hadoop to http /jmx collection

* remove the old java jars
* Create an http base class for hadoop metrics2
* Create hadoop namenode and datanode subclasses
* create hbase master and regionserver subclasses
* refactor some functions into utils.

Signed-off-by: Benoit Sigoure <tsunanet@gmail.com>
Try to fallback to ordereddict for Python < 2.7
Properly handle the json module being missing.