Include timeout in name of zuul_runner tasks

This outputs our current timeout value for async.

Change-Id: I9025a867f66c7158048b070ac72f4700255f3d5d
Signed-off-by: Paul Belanger <pabelanger@redhat.com>
diff --git a/zuul/launcher/ansiblelaunchserver.py b/zuul/launcher/ansiblelaunchserver.py
index f07e609..1252e3b 100644
--- a/zuul/launcher/ansiblelaunchserver.py
+++ b/zuul/launcher/ansiblelaunchserver.py
@@ -1028,6 +1028,8 @@
                       cwd=parameters['WORKSPACE'],
                       parameters=parameters)
         task = dict(zuul_runner=runner)
+        task['name'] = ('zuul_runner with {{ timeout | int - elapsed_time }} '
+                        'second timeout')
         task['when'] = '{{ elapsed_time < timeout | int }}'
         task['async'] = '{{ timeout | int - elapsed_time }}'
         task['poll'] = 5