Add new create_fork arguments (#2493)

Adds support for new `create_fork` arguments:
 - `name` - To set the name of the fork on creation
 - `default_branch_only` - To only include the default branch

Signed-off-by: Jonathan Leitschuh <Jonathan.Leitschuh@gmail.com>

tests/Framework.py

@@ -196,6 +196,7 @@ class ReplayingConnection:
         if isinstance(input, str):
             trInput = input.replace("\n", "").replace("\r", "")
             if input.startswith("{"):
+                assert expectedInput.startswith("{"), expectedInput
                 assert json.loads(trInput) == json.loads(expectedInput)
             else:
                 assert trInput == expectedInput