Merge lp:~asbalderson/jenkins-launchpad-plugin/trigger-fix into lp:jenkins-launchpad-plugin

[Alexander Balderson]

Remove revision arg from autoland no commit message arguments

Revision is not used in any of templates used when autoland
commit message is empty.

[Joshua Powers (powersj)]

review: Approve

=== modified file 'jlp/jenkinsutils.py'
--- jlp/jenkinsutils.py	2019-04-24 17:57:35 +0000
+++ jlp/jenkinsutils.py	2019-05-29 21:15:11 +0000
@@ -832,7 +832,7 @@
                          'autolanding for "%s".' % (mp.web_link))
             template_args = {
                 'result': 'FAILED',
-                'revision': mp.source_branch.revision_count,
+                'revision': None,
                 'build_url': None,
                 'merge_url': mp.web_link
             }