server: FileHandleTest.java:

- Removed static member "VOLUME_NAME". (Tests used tried to create the same volume name in different tests which resulted into an error that the volume already exists.)
- Fixed replication flags for addition of the read-only replica.

git-svn-id: https://xtreemfs.googlecode.com/svn/trunk@3541 f8528748-c2c0-11dd-ba5c-d3b7c2b3b534