calls to _react_param_conversion(json, validate_only) should pass both params

[catmando]

Currently some someplace is calling _react_param_conversion with only the first parameter (i.e. the second is being allowed to default)

But OPAL does not check for missing parameters.

So if you add self._react_param_conversion(json, validate_only) to a class without a default, there will be no warning, validate_only will get JS 'undefined' and your methods will not work correctly

[sollycatprint]

This issue was moved to reactrb/reactrb#94