network/nfs06: rewrite the test and change test-cases

Changes:
* instead of NFSv2 & NFSv3 test runs NFSv3, 4, 4.1 & 4.2.
* remove test duration, fsstress processes are running with '1 loop'
  parameter. After a process completes, test will check its status.
* sar statistic was removed for now. Test didn't handle it and just
  saved it to a file.
* add '-c' option, which prevents fsstress to cleanup its files as
  there can be multiple processes running and using the same files.

Signed-off-by: Alexey Kodanev <alexey.kodanev@oracle.com>
Reviewed-by: Cyril Hrubis <chrubis@suse.cz>
2 files changed