add prometheus integration and fix the logout issue for ldap (#2638)

apollo-portal/src/main/java/com/ctrip/framework/apollo/portal/spi/configuration/AuthConfiguration.java

@@ -403,13 +403,12 @@ public class AuthConfiguration {
       http.csrf().disable();
       http.headers().frameOptions().sameOrigin();
       http.authorizeRequests()
-          .antMatchers("/openapi/**", "/vendor/**", "/styles/**", "/scripts/**", "/views/**", "/img/**").permitAll()
+          .antMatchers("/prometheus/**","/metrics/**","/openapi/**", "/vendor/**", "/styles/**", "/scripts/**", "/views/**", "/img/**").permitAll()
           .antMatchers("/**").authenticated();
-      http.formLogin().loginPage("/signin").permitAll().failureUrl("/signin?#/error").and().httpBasic();
-      SimpleUrlLogoutSuccessHandler urlLogoutHandler = new SimpleUrlLogoutSuccessHandler();
-      urlLogoutHandler.setDefaultTargetUrl("/signin?#/logout");
+      http.formLogin().loginPage("/signin").defaultSuccessUrl("/", true).permitAll().failureUrl("/signin?#/error").and()
+              .httpBasic();
       http.logout().logoutUrl("/user/logout").invalidateHttpSession(true).clearAuthentication(true)
-          .logoutSuccessHandler(urlLogoutHandler);
+              .logoutSuccessUrl("/signin?#/logout");
       http.exceptionHandling().authenticationEntryPoint(new LoginUrlAuthenticationEntryPoint("/signin"));
     }