Infinispan modularity

This is for _master_ only, I'll send different pull requests for branches 4.4 and 4.5 when this is integrated as these need a slightly different solution, but would hope to get this one accepted first.

https://hibernate.atlassian.net/browse/HSEARCH-1692

The summary of the changeset is to add

    currentThread.setContextClassLoader( InfinispanConfigurationParser.class.getClassLoader() );

before parsing the Infinispan configuration file.
I don't see the need for that as we're trying to keep the Arquillian tests limited since they are so slow.
This fix is very urgent and that's not a priority over other tasks.