Merge "Add a hint for cert tests"

    $(echo "${CERT_TEST_VENV}/bin/python" "${CERT_TEST_VENV}/acts/setup.py" --quiet build --force)

    if [[ $? -ne 0 ]] ; then

        echo "Error building GD Python libraries"

        echo -e "${YELLOW}NOTE:${NOCOLOR} To build external libraries the first time, please add --clean option."

        exit 1

    fi