Make Objects/**Dto.php less strictly

[hackoh]

Currently riot adds properties to Dto very often.
When they add some, this driver don't work because of "Property *** does not exist" error.

[dolejska-daniel]

There actually is a project which can create the data classes from Riot API endpoint documentation. You can find it here: https://github.com/dolejska-daniel/riot-api-docs_parser

[hackoh]

@dolejska-daniel
The problem is that Riot eventually adds new properties undocumented.
I don't want this driver to be vulnerable against undocumented changing.
At least the driver have to be able to run.

[dolejska-daniel]

Damn 😄 Well, it will be best to make DTO instance population not so strict.