LU-7931 tests: setup/cleanup after every test script

LU-7931 tests: setup/cleanup after every test script

Setup and cleanup the filesystem after every acceptance-small.sh
test to try and catch problems with module references when they
happen instead of causing later tests to fail in mysterious ways.

Test-Parameters: trivial
Signed-off-by: Andreas Dilger <andreas.dilger@intel.com>
Change-Id: I0136ef81c601e7b9ee968ac62d674a8b16500c1e
Reviewed-on: http://review.whamcloud.com/6208
Reviewed-by: Jian Yu <jian.yu@intel.com>
Reviewed-by: Emoly Liu <emoly.liu@intel.com>
Tested-by: Jenkins
Tested-by: Maloo <hpdd-maloo@intel.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>