Fix the test runner script to work on mixed case names.

scripts/run_integration_test.bash

@@ -13,9 +13,9 @@ function get_test_names {
             test_file_full_path=$(readlink -f "$test_file")
             relative_to_samples=$(realpath --relative-to "$samples_dir" "$test_file_full_path")
             without_extension="${relative_to_samples%.org}"
-            echo "${without_extension/\//_}"
+            echo "${without_extension/\//_}" | tr '[:upper:]' '[:lower:]'
         else
-            echo "$test_file"
+            echo "$test_file" | tr '[:upper:]' '[:lower:]'
         fi
     done
 }