MarkingFunctionsFactory.createMarkingFunctions() should not be called as a static initializer

[billoley]

MarkingFunctionsFactory.createMarkingFunctions() ocassionally fails and returns a null. One of the reasons is a VFS / HDFS error. If the failure (null) is cached in a static member of a classs, then that JVM will always have that null value and must be restarted.

Instead, we should call MarkingFunctionsFactory.createMarkingFunctions() when we want the markingFunctions since MarkingFunctionsFactory caches that object in an instance member anyway.