compose-tests: Rename dir based on failure

Should make it easier to tell which compose test failed rather than
going through the verbose output of parallel.

Closes: #1488
Approved by: jlebon

tests/compose-tests/run-test.sh

@@ -7,4 +7,11 @@ mkdir -p ${TEST_ARTIFACTS}
 # Redirect our stdout/stderr, since we don't want what GNU parallel does
 exec 1>${TEST_ARTIFACTS}/output.txt
 exec 2>&1
-exec $(dirname $0)/${tf}
+# Rename the dir itself if non-zero rc to make it easy to know what failed
+rc=0
+$(dirname $0)/${tf} || rc=$?
+if [ $rc == 0 ]; then
+  mv ${TEST_ARTIFACTS}{,.pass}
+else
+  mv ${TEST_ARTIFACTS}{,.fail.$rc}
+fi