Feature/nuance stt (#185)

* initial changes to gather to support nuance stt

* updateSpeechCredentialLastUsed could be called without a speech_credential_sid if credentials are passed in the flow

* fix bugname

* typo

* added handlers for nuance

* logging

* major refactor of parsing transcriptions

* initial support for nuance in transcribe verb

* updates from testing

* cleanup some tests

* update action

* typo

* gather: start nuance timers after say/play completes

* update drachtio-fsrmf

* refactor some code

* typo

* log nuance error detail

* timeout handling

* typo

* handle nuance 413 response when recognition times out

* typo in specs.json

* add support for nuance resources

* fixes and tests for transcribe

* remove logging from test

* initial support for kryptonEndpoint

* try getting access token even when using krypton

* typo in kryptonEndpoint property

* add support for Nuance tts

* parse nuance voice and model for tts

* use nuance credentials from db

* update to db-helpers@0.7.0 with caching option

* add support for azure audio logging in gather/transcribe

* sync package-lock.json

test/index.js

@@ -5,6 +5,7 @@ require('./account-validation-tests');
 require('./webhooks-tests');
 require('./say-tests');
 require('./gather-tests');
+require('./transcribe-tests');
 require('./sip-request-tests');
 require('./create-call-test');
 require('./play-tests');