change string ReuseFactor to int

Created by: jmitrevs

This is a minor fix for when a configuration doesn't have a ReuseFactor set. Most of the code, and hls4ml-tutorial suggests that the ReuseFactor should be an int and not a string . I think we should agree that it should always be an int and not a allow a string.

I ran into this problem testing onnx models with quartus in a different branch, but the issue is not specific to that branch or input.

hls4ml/converters/__init__.py

@@ -161,7 +161,7 @@ def _check_model_config(model_config):
     else:
         model_config = {}
         model_config['Precision'] = 'ap_fixed<16,6>'
-        model_config['ReuseFactor'] = 1        
+        model_config['ReuseFactor'] = 1
 
     return model_config