Datastore for Infinispan

Based on list conversation and a bunch of resources as posted below it is time to get the gora-infinispan module integrated into master branch. I will submit a pull request ASAP.

http://www.mail-archive.com/dev%40gora.apache.org/msg06510.html
https://github.com/leads-project/gora-infinispan
http://blog.infinispan.org/2015/09/initial-support-for-apache-avro-and-gora.html
http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=7214069&filter%3DAND%28p_IS_Number%3A7212169%29%26rowsPerPage%3D100