pmd: fix #1074 rule priority doesn't work on group definitions
and verify #1067 Custom Ruleset doesn't import the complete ruleset anymore by reference
pmd: fix #1073 Hard coded violation messages CommentSize
pmd: #1002 False +: FinalFieldCouldBeStatic on inner class
pmd: cleanup design test cases
pmd: fix #1005 False + for ConstructorCallsOverridableMethod - overloaded methods

It won't be perfect, but for constructor calls and method calls a
simple check of the argument types is done. Primitive types are
distinguished, reference types not.
In order to support all cases, full symbol resolution is needed.