LU-6966 test: Dash in FSNAME causes warning in testframework

The FSNAME with dash was causing warning in test-framework.sh. These
are specifically due to use of FSNAME with dash in l-value of the
export statement. So export statement has been modified such that it
will not to include dash in its l-value.

Seagate-bug-id: MRP-2171
Signed-off-by: Lokesh Nagappa Jaliminche <lokesh.jaliminche@seagate.com>
Signed-off-by: Bhagyesh Dudhediya <bhagyesh.dudhediya@seagate.com>
Change-Id: Ia4d690c6529b287bb008f11a57e8131a2facfba4
Reviewed-on: http://review.whamcloud.com/15925
Tested-by: Jenkins
Tested-by: Maloo <hpdd-maloo@intel.com>
Reviewed-by: Jian Yu <jian.yu@intel.com>
Reviewed-by: Andreas Dilger <andreas.dilger@intel.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>