Add option to specify filename for instances in GameInstanceGenerator…

… (cleaned) (#44)

* add option to specify filename for instances in GameInstanceGenerator.generate(), default is set to instances.json to allow for backward compatibility

* inline no where else used storing function

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Co-authored-by: Anne Beyer <anne.beyer@uni-potsdam.de>

clemgame/clemgame.py

@@ -859,12 +859,9 @@ def add_game_instance(self, experiment: Dict, game_id):
     def on_generate(self):
         raise NotImplementedError()
 
-    def generate(self):
+    def generate(self, filename="instances.json"):
         self.on_generate()
-        self.store()
-
-    def store(self):
-        self.store_file(self.instances, "instances.json", sub_dir="in")
+        self.store_file(self.instances, filename, sub_dir="in")
 
 
 def load_benchmarks(do_setup: bool = True) -> List[GameBenchmark]: