Fixed rate handling limit handling

Issue #220. If RateLimitHandler returns normally, it should retry.

src/main/java/org/kohsuke/github/Requester.java

@@ -501,6 +501,7 @@ class Requester {
 
         if ("0".equals(uc.getHeaderField("X-RateLimit-Remaining"))) {
             root.rateLimitHandler.onError(e,uc);
+            return;
         }
 
         InputStream es = wrapStream(uc.getErrorStream());

src/test/java/Foo.java

@@ -1,4 +1,5 @@
 import org.kohsuke.github.GHRepository;
+import org.kohsuke.github.GHUser;
 import org.kohsuke.github.GitHub;
 
 import java.util.Collection;
@@ -14,4 +15,11 @@ public class Foo {
         }
         System.out.println(lst.size());
     }
+
+    private static void testRateLimit() throws Exception {
+        GitHub g = GitHub.connectAnonymously();
+        for (GHUser u : g.getOrganization("jenkinsci").listMembers()) {
+            u.getFollowersCount();
+        }
+    }
 }