Spring OAuth2 resource classes not getting called - spring

Question

In reference to the below questions asked on StackOverflow, I have included a class
annotated with #Configuration, #EnableResourceServer and #EnableWebSecurity.
The code is building fine but the control is not going in this class which have been annotated the aforementioned way.
Do I need resource server with Spring Security OAuth2?
I checked that Security filters were disabled in my web.xml. Now, I have enabled them. Even though I am not getting the intended result when I hit my request, I think the initial issue is fixed.
That issue got solved but now I am facing another issue:
HTTP Status 500 - Failed to evaluate expression 'ROLE_USER'
root cause: org.springframework.expression.spel.SpelEvaluationException: EL1008E: Property or field 'ROLE_USER' cannot be found on object of type 'org.springframework.security.web.access.expression.WebSecurityExpressionRoot' - maybe not public?
web.xml:
<?xml version="1.0" encoding="UTF-8"?>
<web-app version="3.0" xmlns="http://java.sun.com/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd">
<display-name>hk-pensions</display-name>
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:META-INF/spring/*.xml</param-value>
</context-param>
<context-param>
<param-name>defaultHtmlEscape</param-name>
<param-value>true</param-value>
</context-param>
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<servlet>
<servlet-name>dispatcher</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>/WEB-INF/dispatcher-servlet.xml</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>dispatcher</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
<!-- Spring Security -->
<filter>
<filter-name>springSecurityFilterChain</filter-name>
<filter-class>org.springframework.web.filter.DelegatingFilterProxy</filter-class>
</filter>
<filter-mapping>
<filter-name>springSecurityFilterChain</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>