LU-1192 tests: automate POSIX compliance testing

LU-1192 tests: automate POSIX compliance testing

a. assuming that the POSIX source already installed
on the system
b. setup loop back ext4 filesystem
c. install, build and run POSIX binaries on ext4
d. run POSIX again lustre
f. compare results from ext4 and lustre

Signed-off-by: Minh Diep <mdiep@whamcloud.com>
Change-Id: I104a43549a2dedf272b52c4c9ce3ab0d50a223eb
Reviewed-on: http://review.whamcloud.com/2256
Tested-by: Hudson
Tested-by: Maloo <whamcloud.maloo@gmail.com>
Reviewed-by: Yu Jian <yujian@whamcloud.com>
Reviewed-by: Wei Liu <sarah@whamcloud.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>