TestHDFSServerPorts#testBackupNodePorts doesn't pass on Windows

In TestHDFSServerPorts.testBackupNodePorts, there are two attempts at starting backup node.

Attempt 1:
1) It binds namenode backup address with 0:

backup_config.set(DFSConfigKeys.DFS_NAMENODE_BACKUP_ADDRESS_KEY, THIS_HOST);

2) It sets namenode backup address with an available port X.
3) It fails rightfully due to using the same http address as active namenode.

Attempt 2:
1) It tries to reuse port X as namenode backup address.
2) It fails to bind to X because Windows does not release port X properly after Attempt 1 fails.