test failures on trunk

[Eli Collins]

Hey gang,

Looks like a number of the trunk tests
(https://builds.apache.org/job/Hadoop-Hdfs-trunk) started failing on
the 10th, due to the following. Ring a bell?  Maybe due to all the
recent protocol changes?

Error Message

org.apache.hadoop.hdfs.protocol.HdfsFileStatus cannot be cast to
org.apache.hadoop.hdfs.protocol.HdfsLocatedFileStatus
Stacktrace

java.lang.ClassCastException:
org.apache.hadoop.hdfs.protocol.HdfsFileStatus cannot be cast to
org.apache.hadoop.hdfs.protocol.HdfsLocatedFileStatus
        at 
org.apache.hadoop.hdfs.DistributedFileSystem$1.hasNext(DistributedFileSystem.java:452)
        at org.apache.hadoop.fs.FileSystem$5.hasNext(FileSystem.java:1551)
        at org.apache.hadoop.fs.FileSystem$5.next(FileSystem.java:1581)
        at org.apache.hadoop.fs.FileSystem$5.next(FileSystem.java:1541)
        at 
org.apache.hadoop.fs.TestListFiles.testDirectory(TestListFiles.java:146)

Thanks,
Eli