fix issue in script.sh (set -u/+u)

Author: alphaville

ci/script.sh

@@ -62,15 +62,18 @@ run_python_core_tests() {
 
 run_python_ros2_tests() {
     export PYTHONPATH=.
+    set +u
     if [ -n "${ROS_DISTRO:-}" ] && [ -f "/opt/ros/${ROS_DISTRO}/setup.bash" ]; then
         # setup-ros installs the ROS underlay but does not source it for our shell
         source "/opt/ros/${ROS_DISTRO}/setup.bash"
     elif [ -f "/opt/ros/jazzy/setup.bash" ]; then
         source "/opt/ros/jazzy/setup.bash"
     else
+        set -u
         echo "ROS2 environment setup script not found"
         exit 1
     fi
+    set -u
 
     command -v ros2 >/dev/null
     command -v colcon >/dev/null