Add method getAllHeaders to make RoboElectric work with SpringTemplate
diff --git a/src/main/java/com/xtremelabs/robolectric/tester/org/apache/http/TestHttpResponse.java b/src/main/java/com/xtremelabs/robolectric/tester/org/apache/http/TestHttpResponse.java
index c077244..69d6e3c 100644
--- a/src/main/java/com/xtremelabs/robolectric/tester/org/apache/http/TestHttpResponse.java
+++ b/src/main/java/com/xtremelabs/robolectric/tester/org/apache/http/TestHttpResponse.java
@@ -38,6 +38,10 @@
         return httpEntity;
     }
 
+    @Override public Header[] getAllHeaders() {
+        return new Header[] { contentType };
+    }
+
     public class TestHttpEntity extends HttpEntityStub {
         @Override public long getContentLength() {
             return responseBody.length();