Fixes spring-projectsgh-5760

- fix static import

Author: mlevkovsky

oauth2/oauth2-client/src/test/java/org/springframework/security/oauth2/client/web/DefaultOAuth2AuthorizationRequestResolverTests.java

@@ -27,7 +27,9 @@
 import org.springframework.security.oauth2.core.endpoint.OAuth2AuthorizationResponseType;
 import org.springframework.security.oauth2.core.endpoint.OAuth2ParameterNames;
 
-import static org.assertj.core.api.Assertions.*;
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.assertj.core.api.Assertions.assertThatThrownBy;
+import static org.assertj.core.api.Assertions.entry;
 
 /**
  * Tests for {@link DefaultOAuth2AuthorizationRequestResolver}.