test: Small fixups to t4 and a rename

test/shell/graph-fanin-1.sh

@@ -0,0 +1,7 @@
+#!/bin/bash -e
+
+# should take slightly more than 25s, but fail if we take 35s)
+$timeout --kill-after=35s 30s ./mgmt run --yaml graph-fanin-1.yaml --converged-timeout=5 --no-watch --tmp-prefix --no-pgp &
+pid=$!
+wait $pid	# get exit status
+exit $?