GRAILS-10840 Don't depend on file.encoding setting in GrailsMockHttpServletRequest
GRAILS-10840 GRAILS-10817 Fix encoding issues in AbstractRequestBodyDataBindingSourceCreator
GRAILS-10840 always specify the encoding to use for String.getBytes and IOGroovyMethods.getText
- don't rely on "file.encoding" being UTF-8
GRAILS-10840: specify encoding (UTF-8) for ant.replace task usage
- don't depend on file.encoding system property setting