[SUREFIRE-571] Put off instantiation of the Runner instance for a JUnit4TestSet instance until that test set is executed, to prevent static initialization of classes not currently being executed.
Changed paths:
maven/surefire/trunk/surefire-integration-tests/src/test/java/org/apache/maven/surefire/its/TestJUnit4ForkAlwaysStaticInitPollution.java
maven/surefire/trunk/surefire-integration-tests/src/test/resources/junit4-forkAlways-staticInit/