Optimize PitMP execution by excluding detected mutations

[oscarlvp]

Right now PitMP may analyze the same mutation several times if it is covered by tests in different modules. So, before running the tests on a module it would be nice to check if the mutation was detected before by the tests of a previous module. One way to do it could be to create a listener that records the outcome for each mutation and then an interceptor that prevents killed mutants from being analyzed later.