WS: Fix default resource
WS: Change default port

* Now same default port as bosh
* defaults to same port as mongooseIM
Be ready for <stream:error> when validating authentication

escalus_auth:wait_for_success/2 was crashing up on receiving
<stream:error>. Such a situation occurs when a client tries to
authenticate before <starttls> was issued and TLS is required by
the server.
Merge pull request #47 from esl/starttls_bypass

Be ready for <stream:error> when validating authentication
Merge pull request #44 from psytale/ws_fixes

Websocket default values fixes
update username in props in case of anon auth