Fixing issue raised in #247

From Shredder121,
--------------------
Only the HttpURLConnection.method was set by that change. Not the
Requester.method.

This means that Requester.method is still set to POST, isMethodWithBody
will return true, and uc.setDoOutput(true) will be called.

I use Okhttp, and their HttpURLConnectionImpl's method changes to POST
if you tell it to open a stream to write to.

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

@@ -264,10 +264,9 @@ private <T> T _to(String tailApiUrl, Class<T> type, T instance) throws IOExcepti
      */
     public int asHttpStatusCode(String tailApiUrl) throws IOException {
         while (true) {// loop while API rate limit is hit
+            method("GET");
             setupConnection(root.getApiURL(tailApiUrl));
 
-            uc.setRequestMethod("GET");
-
             buildRequest();
 
             try {
@@ -280,12 +279,10 @@ public int asHttpStatusCode(String tailApiUrl) throws IOException {
 
     public InputStream asStream(String tailApiUrl) throws IOException {
         while (true) {// loop while API rate limit is hit
+            method("GET");  // if the download link is encoded with a token on the query string, the default behavior of POST will fail
             setupConnection(root.getApiURL(tailApiUrl));
 
-            // if the download link is encoded with a token on the query string, the default behavior of POST will fail
-            uc.setRequestMethod("GET");
-
-            buildRequest();        
+            buildRequest();
 
             try {
                 return wrapStream(uc.getInputStream());