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Add the Class FUTestMpi, that have one only attribute : FMpi. The reason is the following, FMpi need for its initialisation the args argc and argv, so it cannot be done in RunTest() since its protype is fied (void RunTest(void)). Btw, I overloaded Print function for this class in order to avoid multiple prints (only root prints).

Old FMPiLoader has been move to to delete, and testMpiSort has ben moved to UTest/NoDist until it matches th requisite for a utest, then, it will be moved to UTest