TACHYON-15 Tachyon shell hang when trying to get multi blocks file.
Add unit test to check for FileInStream EOF.
TACHYON-15

-) Wrap with try/finally
-) Check for 0 for return from read (should never happen unless len is 0)
Merge pull request #415 from hsaputra/TACHYON-15_shell_hang_copy_chukedblocks

TACHYON-15 Tachyon shell hang when trying to get multi blocks file.