Make SocialAutoConfigurerAdapter/Properties public

Fixes gh-6078

spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/social/SocialAutoConfigurerAdapter.java

@@ -26,9 +26,9 @@ import org.springframework.social.connect.ConnectionFactory;
  *
  * @author Craig Walls
  * @author Phillip Webb
- * @since 1.1.0
+ * @since 1.4.0
  */
-abstract class SocialAutoConfigurerAdapter extends SocialConfigurerAdapter {
+public abstract class SocialAutoConfigurerAdapter extends SocialConfigurerAdapter {
 
 	@Override
 	public void addConnectionFactories(ConnectionFactoryConfigurer configurer,

spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/social/SocialProperties.java

@@ -22,9 +22,9 @@ import org.springframework.boot.context.properties.ConfigurationProperties;
  * Base {@link ConfigurationProperties properties} for spring social.
  *
  * @author Stephane Nicoll
- * @since 1.2.0
+ * @since 1.4.0
  */
-abstract class SocialProperties {
+public abstract class SocialProperties {
 
 	/**
 	 * Application id.