[EASY] fix max-category-items (#813)

* fix max-category-items

* match default for max category items

fe had 1000, be had 100

server/test/test_scanpy_engine.py

@@ -78,8 +78,6 @@ class EngineTest(unittest.TestCase):
     def test_schema(self):
         with open(path.join(path.dirname(__file__), "schema.json")) as fh:
             schema = json.load(fh)
-            print(schema)
-            print(self.data.schema)
             self.assertEqual(self.data.schema, schema)
 
     def test_schema_produces_error(self):