Tests fix (#16)

* Fix and Update: TestValidateCheck

* Create TestValidateCheckU2F.php

* Create TestValidateCheckWebauthn.php

* Fix: PrivacyIDEA->validateCheck()

$pass can be empty

* Update TestValidateCheckU2F.php

* Update TestValidateCheckWebauthn.php

+ Create UtilsForTests

* fix code duplicate

* Fix: PrivacyIDEA->validateCheckU2F()

 all 3 parameters have to be set

* Fix: PrivacyIDEA->validateCheckWebAuthn()

all 4 property have to be set

* Update u2f and webauthn

* Fix and update: TestTriggerChallenge

* add realm

* Delete TestGetAuthToken.php

* Fix: get token info

* Update TestEnrollToken.php

* Update TestPollTransaction.php

* Update TestValidateCheckWebauthn.php

* Add u2fMessage() to PIResponse

* Update TestPollTransaction.php

* Update TestTriggerChallenge.php

* Update TestValidateCheck.php

* Update TestValidateCheckU2F.php

* Update TestValidateCheckWebauthn.php

* move authToken to the Utils