Building test cases broken on java-1.4, TextTest.java has string creation bug.

*Test Files
— src/test/org/apache/hadoop/io/TestText.java (revision 432549)
— src/test/org/apache/hadoop/mapred/MiniMRCluster.java (revision 432549)
— src/test/org/apache/hadoop/mapred/TestSequenceFileInputFilter.java (revision 432549)
— src/test/org/apache/hadoop/dfs/TestDFSShellGenericOptions.java (revision 432549)

Broken on java-1.4
and a bug in static method getTestString(int len).
This function generates a character with code point equal or smaller then 0xFFFF, and converts this into array of chars of size 2(which should be one) and appened it buffer.
So resulting into a a null character tobe inserted into string after a no null character.

Find Patch attached.