add stdout to gpsans tool

<tool id="neutrons_gpsans" name="GPSANS"  profile="22.05" version="0.1.1">

<tool id="neutrons_gpsans" name="GPSANS"  profile="22.05" version="0.1.2">

  <description></description>

    <requirements>

        <container type="docker">code.ornl.gov:4567/ndip/tool-sources/sans-data-reduction/gpsans-reduction:0.1.0</container>

        <container type="docker" shell="/bin/bash">code.ornl.gov:4567/ndip/tool-sources/sans-data-reduction/gpsans-reduction:0.1.0</container>

    </requirements>

    <command detect_errors="exit_code"><![CDATA[

        mkdir reduced &&

        echo ipts_number = None > /app/staff_input.py &&

        echo output_directory = None >> /app/staff_input.py &&

        cat $staff_input >> /app/staff_input.py &&

        python /app/gpsans.py -i $ipts_number -o reduced >$output 2>&1 ;

        python /app/gpsans.py -i $ipts_number -o reduced

        > >(tee -a $output) 2> >(tee -a $output >&2)

    ]]></command>

    <inputs>

        <param name="ipts_number" type="integer" optional="false" value="0" label="IPTS Number"/>