mrc: re-generated interface from IDL, enforced xcap timeout to be at least...

mrc: re-generated interface from IDL, enforced xcap timeout to be at least twice the renewal time span

git-svn-id: https://xtreemfs.googlecode.com/svn/trunk@1423 f8528748-c2c0-11dd-ba5c-d3b7c2b3b534