Memory leak happening during windup-ruleset tests execution

There seems to be a memory rampup during test execution in the windup-ruleset project (more specifically, during execution of the WindupRulesTest). This has been proved by connecting jConsole to the surefire plugin execution (see attached image).

Graphs don't seem to be being cleared up properly and accumulate in the graph context - this is the most probable culprit, but still has to be investigated.