[py] Do not add a body to anything other than POST or PUT commands Fixes

 SeleniumHQ#6250

Some servers seem to read the body of GET requests and then crash, this
change helps them not crash but in reality they need to be doing their
own defensive code.

py/selenium/webdriver/remote/remote_connection.py

@@ -392,9 +392,10 @@ def _request(self, method, url, body=None):
         parsed_url = parse.urlparse(url)
         headers = self.get_remote_connection_headers(parsed_url, self.keep_alive)
         resp = None
+        if body and method != 'POST' and method != 'PUT':
+            body = None
+
         if self.keep_alive:
-            if body and method != 'POST' and method != 'PUT':
-                body = None
             resp = self._conn.request(method, url, body=body, headers=headers)
 
             statuscode = resp.status