1158 - Fixed method accessibility issue which arose after merging master

Author: Mario

extensions/servlet/src/main/java/com/stormpath/sdk/servlet/mvc/provider/GenericOAuth2ProviderCallbackController.java

@@ -14,7 +14,7 @@
 public class GenericOAuth2ProviderCallbackController extends AbstractSocialCallbackController {
 
     @Override
-    protected ProviderAccountRequest getAccountProviderRequest(HttpServletRequest request) {
+    public ProviderAccountRequest getAccountProviderRequest(HttpServletRequest request) {
         String providerId = ServletUtils.getCleanParam(request, "providerId");
         String code = ServletUtils.getCleanParam(request, "code");