deploy_production_local: Correctly accept prod branch as clean.

We were declaring the server cautotest as dirty because it has a local
'prod' branch. We've decided to keep this branch for now, so it should be
treated as clean.

Also redo some command output to make it more understandable, especially
when --dryrun is specified.

BUG=chromium:425636
TEST=Unittests + dryrun testing.

Change-Id: I2828d79f7f5bd56140103c99379d7f26e5be885a
Reviewed-on: https://chromium-review.googlesource.com/234820
Reviewed-by: Don Garrett <dgarrett@chromium.org>
Commit-Queue: Don Garrett <dgarrett@chromium.org>
Tested-by: Don Garrett <dgarrett@chromium.org>
diff --git a/contrib/deploy_production.py b/contrib/deploy_production.py
index 242ae01..b77ae83 100755
--- a/contrib/deploy_production.py
+++ b/contrib/deploy_production.py
@@ -82,7 +82,8 @@
         print('%s: %s' % (server, cmd))
         if not options.dryrun:
             try:
-                infra.execute_command(server, cmd)
+                out = infra.execute_command(server, cmd)
+                print(out)
                 print('Success')
                 print()
             except subprocess.CalledProcessError as e: