Add check on really Quip reply form post before checking fields on errors.

 - Add some precheck if it's Quip form send, cause sometimes there is 2 or more
   forms on one page and Quip reports empty fields even it's form not really send.
 - Fix tests on load captcha with user login. Old test used deprecated parameter
 - Fix tests with empty provider data: sometimes using NULL as default value
   instead of default method parameter.

Signed-off-by: Egor Bolgov <egor.b@fabricasaitov.ru>