Delete isn't a post method

This should fix the issue described in this stack overflow question https://stackoverflow.com/questions/49714538/unable-to-delete-an-object-parse-server

Author: shai-almog

Diff for: src/com/parse4cn1/command/ParseDeleteCommand.java

@@ -42,7 +42,7 @@ public ParseDeleteCommand(String endPoint) {
     @Override
     void setUpRequest(ConnectionRequest request) throws ParseException {
         setupDefaultHeaders();
-        request.setPost(true);
+        request.setPost(false);
         request.setHttpMethod("DELETE");
         request.setUrl(getUrl(endPoint, objectId));
     }