Don't suggest change author as reviewer.

Change-Id: Ie34fc34883b2c86fc134f10ded24b26a631886ec
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/tools/depot_tools/+/2676835
Reviewed-by: Josip Sokcevic <sokcevic@google.com>
Commit-Queue: Edward Lesmes <ehmaldonado@chromium.org>

git_cl.py

@@ -1382,7 +1382,7 @@ class Changelist(object):
         f for f in files
         if status[f] == owners_client.OwnersClient.INSUFFICIENT_REVIEWERS
       ]
-      owners = client.SuggestOwners(missing_files)
+      owners = client.SuggestOwners(missing_files, exclude=[self.GetAuthor()])
       if options.add_owners_to == 'TBR':
         assert isinstance(options.tbrs, list), options.tbrs
         options.tbrs.extend(owners)
@@ -4806,7 +4806,8 @@ def CMDowners(parser, args):
 
   if options.batch:
     client = owners_client.DepotToolsClient(root, base_branch)
-    print('\n'.join(client.SuggestOwners(affected_files)))
+    print('\n'.join(
+        client.SuggestOwners(affected_files, exclude=[cl.GetAuthor()])))
     return 0
 
   owner_files = [f for f in affected_files if 'OWNERS' in os.path.basename(f)]

presubmit_canned_checks.py

@@ -1182,7 +1182,8 @@ def CheckOwners(
     if tbr and affects_owners:
       output_list.append(output_fn('TBR for OWNERS files are ignored.'))
     if not input_api.is_committing:
-      suggested_owners = input_api.owners_client.SuggestOwners(missing_files)
+      suggested_owners = input_api.owners_client.SuggestOwners(
+          missing_files, exclude=[owner_email])
       output_list.append(output_fn('Suggested OWNERS: ' +
           '(Use "git-cl owners" to interactively select owners.)\n    %s' %
           ('\n    '.join(suggested_owners))))