Fix MojUtil test

GF-5238
Fixed by working folder change to  /tmp
because of NFS wrong behaviour: reported folders attr as files.

Open-webOS-DCO-1.0-Signed-off-by: Igor Kuksyuk <ikuksyuk@luxoft.com>

Change-Id: Ia271be04f49d41f730197ebdb8e631a94051fca9
Reviewed-on: https://g2g.palm.com/2690
Reviewed-by: Build Verification
Reviewed-by: Igor Kuksyuk <ikuksyuk@luxoft.com>
Tested-by: Igor Kuksyuk <ikuksyuk@luxoft.com>
Reviewed-by: Roger Stringer <roger.stringer@lge.com>