Issue #951

add realization new methods
https://github.com/TheWeatherCompany/grid-api/pull/967
hey @ckelner. i think this is not necessary, because we get the exception during ```EC2Method(this, getEc2Url(), parameters).invoke()```, otherwise method will finish without error. Also we did a detailed log. #https://github.com/TheWeatherCompany/grid-api/commit/18042874d87722402196dd783077b2deda01d513  :)