fix(tests): fixed the creation of non-linear commits creation in tests

- This addresses and makes a fix for #5706

rhodecode/api/tests/test_create_pull_request.py

@@ -342,7 +342,7 @@ class TestCreatePullRequestApi(object):
         commits = [
             {'message': 'initial'},
             {'message': 'change'},
-            {'message': 'new-feature', 'parents': ['initial']},
+            {'message': 'new-feature', 'parents': ['initial'], 'branch': 'feature'},
         ]
         self.commit_ids = backend.create_master_repo(commits)
         self.source = backend.create_repo(heads=[source_head])