performance test is added

This test shows both latency and memory consumption
The main issue we can see is the huge memory usage.
As the number of rules is greater we the memory usage is growing very fast.
In order to see the results please see the "results" folder
In order to run/debug the test please run "DroolsPerformanceTest:processXMinorThenYMainEvents"
To configure the test change in visitor-event-processor-test-single-config.properties:
web.flow.test.numOfDrls
and/or
web.flow.test.numOfVisitors