client: Fixed problem that the additional usermappings were not processed...

client: Fixed problem that the additional usermappings were not processed i.e., Globus and Unicore user mappings were effectively broken.

git-svn-id: https://xtreemfs.googlecode.com/svn/trunk@3675 f8528748-c2c0-11dd-ba5c-d3b7c2b3b534