#3060: checkout to non broken commit

Author: mo-tgeddes

esmvaltool/utils/recipe_test_workflow/recipe_test_workflow/app/install_cold/bin/install_cold.sh

@@ -32,6 +32,8 @@ fi
 # (which is done via done via 'stderr').
 git clone -q -b "${BRANCH}" "${ESMVALTOOL_URL}" "${ESMVALTOOL_DIR}"
 git clone -q -b "${BRANCH}" "${ESMVALCORE_URL}" "${ESMVALCORE_DIR}"
+cd "${ESMVALCORE_DIR}"
+git checkout 4527173
 
 # Manually and temporarily install imagehash (it will be included in the
 # next ESMValTool community environment).