VFS2 uses a profile "hdfs" to turn off the Hdfs Tests on Windows. This profile is quite confusingly named (as the other profiles which have a provider name turn on special tests and not turn them off based on OS).
Also there is no reason for this Profile (anymore?) as the HDFS Mini Cluster and the test cases run perfectly fine on my Windows system. The only thing which needs to be disabled is the execution of the umask program - but this is not needed on Windows it seems, anyway.
I will attach a patch, tell me what you think.