MRC: data transmission with 'replicate on close' is only triggered if replicas...

MRC: data transmission with 'replicate on close' is only triggered if replicas are 'full' according to the default replication policy

git-svn-id: https://xtreemfs.googlecode.com/svn/trunk@2827 f8528748-c2c0-11dd-ba5c-d3b7c2b3b534