delete Java grammer from pmd-core - it's now in pmd-java
#1273 CheckResultSet false positive in try-with-resources nested in if
#1263 PMD reports CheckResultSet violation in completely unrelated source files.
#550 False +: MissingBreakInSwitch
#1252 net.sourceforge.pmd.lang.ast.TokenMgrError: Lexical error in file xxx.cpp
#1272 varargs in methods are causing IndexOutOfBoundException when trying to process files
#1262 False positive for MissingBreakInSwitch
Checkstyle/whitespace fixes