deleteInvalidId
open chrome://restclient/content/restclient.html
click link=Headers
click link=Custom Header
type name=name Cookie
type name=value token=bXJqYXRvOm1yamF0bw==
click css=#modal-custom-header > div.modal-footer > input.btn.btn-inverse
click link=DELETE
type id=request-url http://localhost:9080/DAAExample/rest/people/100
click id=request-button
click link=×
waitForElementPresent css=span.header-value
assertText css=span.header-value 400 Bad Request