fix travis.sh to really go back to start directory
fix travis.sh to really go back to start directory

geoffreychiou/industrial_ci,tecnalia-advancedmanufacturing-robotics/industrial_ci,ros-industrial/industrial_ci,ros-industrial/industrial_ci,tecnalia-advancedmanufacturing-robotics/industrial_ci,tecnalia-advancedmanufacturing-robotics/industrial_ci,geoffreychiou/industrial_ci,ros-industrial/industrial_ci