pgraph: Move the quiesce done indicator to avoid deadlock

This avoids a deadlock on resource failure when retry==0. Without this
we would never exit. This adds a test in too!

test/shell/exec-fail.sh

@@ -0,0 +1,9 @@
+#!/bin/bash -e
+
+# should take a few seconds plus converged timeout, and test we don't hang!
+# TODO: should we return a different exit code if the resources fail?
+# TODO: should we be converged if one of the resources has permanently failed?
+$timeout --kill-after=20s 15s ./mgmt run --yaml exec-fail.yaml --converged-timeout=5 --no-watch --no-pgp --tmp-prefix &
+pid=$!
+wait $pid	# get exit status
+exit $?

test/shell/exec-fail.yaml

@@ -0,0 +1,15 @@
+---
+graph: mygraph
+resources:
+  exec:
+  - name: exec1
+    cmd: false this should fail but not hang
+    shell: ''
+    timeout: 0
+    watchcmd: sleep 5s
+    watchshell: ''
+    ifcmd: ''
+    ifshell: ''
+    pollint: 0
+    state: present
+edges: []