LU-9892 test: fix SuSe nfsserver setup

LU-9892 test: fix SuSe nfsserver setup

Checking for SuSE-release and use nfsserver
Add export info to a /etc/exports

Test-Parameters: trivial testlist=parallel-scale-nfsv4

Change-Id: Id12370ae35d878e51bdf6f71a77b1b82b5e82c33
Signed-off-by: Minh Diep <minh.diep@intel.com>
Reviewed-on: https://review.whamcloud.com/30476
Tested-by: Jenkins
Tested-by: Maloo <hpdd-maloo@intel.com>
Reviewed-by: Jian Yu <jian.yu@intel.com>
Reviewed-by: James Nunez <james.a.nunez@intel.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>