Ignore custom keys to be able to rewrite any default parameter.

[ferrastas]

Adding this flag, now are able to rewrite default parameters.\

For example, in HWI\Bundle\OAuthBundle\OAuth\ResourceOwner\GitHubResourceOwner there is a custom parameter emails_url that's not defined in the configuration tree builder. (Maybe other OAuth providers has another custom parameters)

Now, the GitHub Resource is fully compatible with GitHub Enterprise adding this in the main project config.yml

hwi_oauth:
    ...
    resource_owners:
        github:
            type:          github
            client_id:     %github.client_id%
            client_secret: %github.client_secret%
            authorization_url: %github.authorization_url%
            access_token_url: %github.access_token_url%
            revoke_token_url: %github.revoke_token_url%
            infos_url: %github.infos_url%
            emails_url: %github.emails_url%

[stloyd]

Thanks!