Moving from Plexus Utils IOUtil to Commons IO IOUtils. close(..) becomes closeQuietly...

Moving from Plexus Utils IOUtil to Commons IO IOUtils. close(..) becomes closeQuietly(..). copy(..) stays the same. In 1.3 (we're on 1.2 currently) copy(..) will throw an exception if more than MAXINT bytes are copied, but this is just a test case so I think we're safe.

git-svn-id: https://svn.apache.org/repos/asf/maven/archiva/trunk@481460 13f79535-47bb-0310-9956-ffa450edef68