8078334: Mark regression tests using randomness
Reviewed-by: xuelei, alanb

8019526: (fs) Files.lines, etc without Charset parameter
Reviewed-by: psandoz, henryjen

8024788: (fs) Files.readAllBytes uses FileChannel which may not be supported by all providers
Reviewed-by: chegar

8020669: (fs) Files.readAllBytes() does not read any data when Files.size() is 0
Reviewed-by: alanb, chegar, martin, rriggs

7006126: (fs) Updates to file system API (1/2011)
Reviewed-by: chegar, sherman