Fix checkstyle violations

See gh-5011

spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/security/oauth2/client/OAuth2RestOperationsConfiguration.java

@@ -200,7 +200,7 @@ public class OAuth2RestOperationsConfiguration {
 
 	static class ClientCredentialsCondition extends AnyNestedCondition {
 
-		public ClientCredentialsCondition() {
+		ClientCredentialsCondition() {
 			super(ConfigurationPhase.PARSE_CONFIGURATION);
 		}
 
@@ -215,7 +215,7 @@ public class OAuth2RestOperationsConfiguration {
 
 	static class NotClientCredentialsCondition extends NoneNestedConditions {
 
-		public NotClientCredentialsCondition() {
+		NotClientCredentialsCondition() {
 			super(ConfigurationPhase.PARSE_CONFIGURATION);
 		}
 

spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/security/oauth2/OAuth2AutoConfigurationTests.java

@@ -196,7 +196,7 @@ public class OAuth2AutoConfigurationTests {
 				"security.oauth2.client.clientId=client",
 				"security.oauth2.client.grantType=client_credentials");
 		this.context.refresh();
-		assertThat(context.getBean(OAuth2ClientContext.class).getAccessTokenRequest())
+		assertThat(this.context.getBean(OAuth2ClientContext.class).getAccessTokenRequest())
 				.isNotNull();
 		assertThat(countBeans(ClientCredentialsResourceDetails.class)).isEqualTo(1);
 		assertThat(countBeans(OAuth2ClientContext.class)).isEqualTo(1);
@@ -212,7 +212,7 @@ public class OAuth2AutoConfigurationTests {
 				"security.oauth2.client.grantType=client_credentials");
 		this.context.refresh();
 		// Thr primary context is fine (not session scoped):
-		assertThat(context.getBean(OAuth2ClientContext.class).getAccessTokenRequest())
+		assertThat(this.context.getBean(OAuth2ClientContext.class).getAccessTokenRequest())
 				.isNotNull();
 		assertThat(countBeans(ClientCredentialsResourceDetails.class)).isEqualTo(1);
 		/*