[util.sh] Correct message. [util.sh] More exception handling. Better local variable names.
[util.sh] Correct message.
[util.sh] More exception handling. Better local variable names.

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