maven surefire tests: set complete locale "en_US"
maven surefire tests: set complete locale "en_US"

refs #916

mihailim/epubcheck,w3c/epubcheck,IDPF/epubcheck,w3c/epubcheck,mihailim/epubcheck,w3c/epubcheck,IDPF/epubcheck,mihailim/epubcheck,mihailim/epubcheck,IDPF/epubcheck,IDPF/epubcheck,mihailim/epubcheck,IDPF/epubcheck