foundation: Added possibility to re-initialize a running TimeSync instance....

foundation: Added possibility to re-initialize a running TimeSync instance. This helps to avoid conflicts with other components that attempt to initialize the TimeSync in the same JVM, such as the server replication plug-in.

git-svn-id: https://xtreemfs.googlecode.com/svn/trunk@2562 f8528748-c2c0-11dd-ba5c-d3b7c2b3b534