Strip gerrit url trailing slash

Test: ./development/tools/repo_pull/repo_review.py 'topic:"..."' --set-topic "..."
Change-Id: Ifaadfdd3ecd615bbe6948be46ac91a15373bdc3b

tools/repo_pull/gerrit.py

@@ -334,7 +334,7 @@ def find_gerrit_name():
         name = remote.getAttribute('name')
         review = remote.getAttribute('review')
         if review and name == default_remote_name:
-            return review
+            return review.rstrip('/')
 
     raise ValueError('cannot find gerrit URL from manifest')