fix mock request for exceptions test
Merge pull request #137 from FriendsOfSymfony/fix-exceptions-test-mock-request

fix mock request for exceptions test
use current class createRequest instead of client
Merge pull request #135 from lepiaf/update-sendrequest

use current class createRequest instead of client
fix accept header handling when client sends no accept header
Merge pull request #134 from FriendsOfSymfony/fix-accept-header-handling

fix accept header handling when client sends no accept header