Use same groupId as Apache Repo and iBiblio Repo.

doc/xdocs/building.html

@@ -69,7 +69,7 @@
   <ol>
 	<pre>cd $ACEGI_SECURITY/doc</pre>
     <pre>maven plugin:download
-    -DgroupId=commons-attributes-plugin
+    -DgroupId=commons-attributes
     -DartifactId=commons-attributes-plugin
     -Dversion=2.1</pre>
   </ol>