Spring + OAuth 2.0 + OpenID Connect

1. Quick Start1.1. Start an authorization server (OpenID provider) at port 8080$ git clone https://github.com/authlete/spring-oauth-server $ cd spring-oauth-server $ vi authlete.properties $ mvn spring-boot:run1.2. Start a resource server at port 8081$ git clone https://github.com/authlete/spring-resource-server $ cd spring-resource-server $ vi authlete.properties $ mvn spring-boot:run1.3. Issue a