Fixed OperationSubscribeOn so OperationConditionalsTest works again.

Author: akarnokd

rxjava-core/src/main/java/rx/operators/OperationSubscribeOn.java

@@ -84,7 +84,7 @@ public void unsubscribe() {
                 public void call(Inner inner) {
                     underlying.unsubscribe();
                     // tear down this subscription as well now that we're done
-                    inner.unsubscribe();
+//                    inner.unsubscribe();
                 }
             });
         }