tesst(http-response-message): fixup broken tests after IE9 fix
tesst(http-response-message): fixup broken tests after IE9 fix

alexanderchr/http-client,davismj/http-client,abbasmhd/http-client,xiwc/http-client,npelletm/http-client,cmichaelgraham/http-client,hitesh97/http-client,aurelia/http-client