All ResourceOwners are collected automatically.

[gassan]

According to #1871 another one commit that needs courage to be merged :)

ResourceOwner oauth types in Configuration are calculated automatically by scandir. All classes extended from GenericOAuth[X]ResourceOwner get oauth[X] type. if class only implements ResourceOwnerInterface then its oauth type is unknown.

ResourceOwner key (parameter type in configs) should have defined ResourceOwner::TYPE constant. If constant not defined or is null, then key will be calculated by converting its class name without ResourceOwner suffix to snake_case. if neither is felt, then InvalidArgumentException will be thrown. Here is possible BC.

Each user defined custom ResourceOwner class that implemented ResourceOwnerInterface will be registered automatically. If autoconfigure option is disabled user have to add the tag hwi_oauth.custom_resource_owner hwi_oauth.resource_owner to the service definition.

Created final classes OAuth1ResourceOwner and OAuth2ResourceOwner.

Fixes #1870

[stloyd]

@gassan Polished a bit the code and it's in! Thanks for your effort!