All gravatar requests now default to 404.

Author: nbradbury

WordPressUtils/src/main/java/org/wordpress/android/util/GravatarUtils.java

@@ -7,7 +7,9 @@
  */
 public class GravatarUtils {
 
-    private static final DefaultImage DEFAULT_GRAVATAR = DefaultImage.MYSTERY_MAN;
+    // by default tell gravatar to respond to non-existent images with a 404 - this means
+    // it's up to the caller to catch the 404 and provide a suitable default image
+    private static final DefaultImage DEFAULT_GRAVATAR = DefaultImage.STATUS_404;
 
     public static enum DefaultImage {
         MYSTERY_MAN,