Fix test and unveil horrible naming convention

This patch fixes test case

    test_run_real (test.hadoop_test.HadoopJobTest)

It's very very saddening to have to commit this. But at the moment I
just want the test case to pass.

Apperently "File" uses "move", "MockFile" uses "rename" and
"HdfsTarget" uses both "move" and "rename". Yuck!