upgrade to spring boot 2

spring-security-sso/spring-security-sso-ui-2/pom.xml

@@ -25,8 +25,9 @@
         </dependency>
 
         <dependency>
-            <groupId>org.springframework.security.oauth</groupId>
-            <artifactId>spring-security-oauth2</artifactId>
+            <groupId>org.springframework.security.oauth.boot</groupId>
+            <artifactId>spring-security-oauth2-autoconfigure</artifactId>
+            <version>${oauth-auto.version}</version>
         </dependency>
 
         <dependency>

spring-security-sso/spring-security-sso-ui-2/src/main/java/org/baeldung/config/UiApplication.java

@@ -2,7 +2,7 @@ package org.baeldung.config;
 
 import org.springframework.boot.SpringApplication;
 import org.springframework.boot.autoconfigure.SpringBootApplication;
-import org.springframework.boot.web.support.SpringBootServletInitializer;
+import org.springframework.boot.web.servlet.support.SpringBootServletInitializer;
 import org.springframework.context.annotation.Bean;
 import org.springframework.web.context.request.RequestContextListener;
 

spring-security-sso/spring-security-sso-ui-2/src/main/java/org/baeldung/config/UiSecurityConfig.java

@@ -5,6 +5,7 @@ import org.springframework.context.annotation.Configuration;
 import org.springframework.security.config.annotation.web.builders.HttpSecurity;
 import org.springframework.security.config.annotation.web.configuration.WebSecurityConfigurerAdapter;
 
+
 @EnableOAuth2Sso
 @Configuration
 public class UiSecurityConfig extends WebSecurityConfigurerAdapter {

spring-security-sso/spring-security-sso-ui-2/src/main/resources/application.yml

@@ -1,6 +1,7 @@
 server:
     port: 8083
-    context-path: /ui2
+    servlet:
+      context-path: /ui2
     session:
       cookie:
         name: UI2SESSION