fix bug with CREATE_DATABASE sending wrong key

database_name is no longer required, so drop it. also wire in the force
arg.

Author: voutilad

neo4j_arrow/_client.py

@@ -231,8 +231,8 @@ def start(self, action: str = "CREATE_GRAPH", *,
         if not config:
             config = {
                 "name": self.graph,
-                "database_name": self.database,
                 "concurrency": self.concurrency,
+                "force": force,
             }
         # TODO: assert config has mandatory fields
         try: