use maven ant tasks for get groovy jar

git-svn-id: https://svn/IT/az/groovy@23896 99cadc30-3bf9-11df-9bc1-510916f65ae8
add pathconvert for full-jar task just works

git-svn-id: https://svn/IT/az/groovy@23897 99cadc30-3bf9-11df-9bc1-510916f65ae8
Merge remote-tracking branch 'remotes/git-svn'