print return code of mysteriously failing test

Signed-off-by: Peter Hillman <[email protected]>

src/test/bin/test_exrmetrics.py

@@ -60,6 +60,7 @@ def cleanup():
 
 result = run (command, stdout=PIPE, stderr=PIPE, universal_newlines=True)
 print(" ".join(result.args))
+print(result.returncode)
 print(result.stdout)
 print(result.stderr)
 assert(result.returncode == 0), "\n"+result.stderr