OAuth 2.0 administration REST endpoints

AM exposes the following administration and supporting REST endpoints:

OAuth 2.0 administration and supporting endpoints
Endpoint	Description
`/realm-config/agents/OAuth2Client`	Register, list, and delete OAuth 2.0 clients (AM specific-endpoint)
`/users/user/oauth2/resources/sets`	Retrieve data for UMA resources registered to a particular user (AM-specific endpoint)
`/users/user/oauth2/applications`	List OAuth 2.0 clients holding active tokens granted by specific resource owners, and delete tokens for a combination of resource owner and client (AM-specific endpoint)