Set to latest public infinispan release, added query dependencies for JDG
Add support for executing Distributed Tasks and MapReduce updates

radargun-1.1.xsd
	Updated XSD file for changed stages

Utils.java
	Add method to invoke public methods with a String parameter on an
object to allow passing parameters from the RadarGun stage to a
MapReduce or Callable object

MapReduceCapable.java
MapReduceStage.java
InfinispanMapReduceWrapper.com
	Add support for passing parameters to Mapper, Reducer, and Collator
objects

Infinispan52MapReduceWrapper.com
	Override membersCount() method to conform to the Infinispan 5.2 API

DistributedTaskCapable.java
DistributedTaskStage.java
InfinispanDistributedTaskWrapper.java
	Add support for executing a Callable object against the cache
Add a reportPrefix property to the ReportJVMMonitorStage

This prefix allows running the same scaling stage multiple times against
different data sets without having conflicting report names.
Address review comments
Synced XSD, removed unused getters/setters