Give probe tests a second chance to pass

...and bump up their timeout, since that seems more likely to happen if
we have to retry.

Change-Id: Ie05521f6cd146234dc5615c96ad19681b43e9110

tools/playbooks/probetests/run.yaml

@@ -21,6 +21,6 @@
       shell:
         cmd: |
           source ~/.bashrc
-          nosetests test/probe/
+          nosetests test/probe/ --with-id || nosetests --failed
         executable: /bin/bash
         chdir: '{{ zuul.project.src_dir }}'