GROOVY-6694: Fix access of static properties from within the trait
GROOVY-6650: Fix method selection in case of last argument being an array
GROOVY-6650: Fix regression in method selection
GROOVY-6674: Fix Double instead of BigDecimal. Added more tests for checking JsonSlurper output types.
Merge pull request #378 from bura/fix-jsonslurper-double

GROOVY-6674: Fix Double instead of BigDecimal. Added more tests for chec...
GROOVY-6255: XMLSlurper accessing xml:id