title: Maven Resources plugin couldn't overwrite read-only file issue
body: <p>It seems to me maven-resources-plugin copy-resource couldn't overwrite read-only files.</p>
  
  <p>The file is read-only because our svn require an "lock" to make it read-write.</p>
  
  <p>It doesn't work if i added "<code>&lt;overwrite&gt;true&lt;/overwrite&gt;</code>" (I understand this is not for this purpose).</p>