pmd: fix #942 CheckResultSet False Positive
 * replacing the xpath rule with a java based rule implementation
pmd: fix #940 False positive on UnsynchronizedStaticDateFormatter
pmd: verify #939 Jsp parser fails on $
pmd: fix #938 False positive on LooseCoupling for overriding methods
pmd: verify #937 OptimizableToArrayCall does not catch multilevel method chains
pmd: fix #1077 Missing JavaDocs for Xref-Test Files