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

lib/tasks/specs.json

@@ -445,7 +445,7 @@
     "properties": {
       "vendor": {
         "type": "string",
-        "enum": ["google", "aws", "microsoft", "default"]
+        "enum": ["google", "aws", "microsoft", "nuance", "default"]
       },
       "language": "string",
       "vad": "#vad",
@@ -509,12 +509,121 @@
       "azureServiceEndpoint": "string",
       "azureSttEndpointId": "string",
       "asrDtmfTerminationDigit": "string",
-      "asrTimeout": "number"
+      "asrTimeout": "number",
+      "nuanceOptions": "#nuanceOptions"
     },
     "required": [
       "vendor"
     ]
   },
+  "nuanceOptions": {
+    "properties": {
+      "clientId": "string",
+      "secret": "string",
+      "kryptonEndpoint": "string",
+      "topic": "string",
+      "utteranceDetectionMode": {
+        "type": "string",
+        "enum": [
+          "single",
+          "multiple",
+          "disabled"
+        ]
+      },
+      "punctuation": "boolean",
+      "profanityFilter": "boolean",
+      "includeTokenization": "boolean",
+      "discardSpeakerAdaptation": "boolean",
+      "suppressCallRecording": "boolean",
+      "maskLoadFailures": "boolean",
+      "suppressInitialCapitalization": "boolean",
+      "allowZeroBaseLmWeight": "boolean",
+      "filterWakeupWord": "boolean",
+      "resultType": {
+        "type": "string",
+        "enum": [
+          "final",
+          "partial",
+          "immutable_partial"
+        ]
+      },
+      "noInputTimeoutMs": "number",
+      "recognitionTimeoutMs": "number",
+      "utteranceEndSilenceMs": "number",
+      "maxHypotheses": "number",
+      "speechDomain": "string",
+      "formatting": "#formatting",
+      "clientData": "object",
+      "userId": "string",
+      "speechDetectionSensitivity": "number",
+      "resources": ["#resource"]
+    },
+    "required": [
+    ]
+  },
+  "resource": {
+    "properties": {
+      "externalReference": "#resourceReference",
+      "inlineWordset": "string",
+      "builtin": "string",
+      "inlineGrammar": "string",
+      "wakeupWord": "[string]",
+      "weightName": {
+        "type": "string",
+        "enum": [
+          "defaultWeight",
+          "lowest",
+          "low",
+          "medium",
+          "high",
+          "highest"
+        ]
+      },
+      "weightValue": "number",
+      "reuse": {
+        "type": "string",
+        "enum": [
+          "undefined_reuse",
+          "low_reuse",
+          "high_reuse"
+        ]
+      }
+    },
+    "required": [
+    ]
+  },
+  "resourceReference": {
+    "properties": {
+      "type": {
+        "type": "string",
+        "enum": [
+          "undefined_resource_type",
+          "wordset",
+          "compiled_wordset",
+          "domain_lm",
+          "speaker_profile",
+          "grammar",
+          "settings"
+        ]
+      },
+      "uri": "string",
+      "maxLoadFailures": "boolean",
+      "requestTimeoutMs": "number",
+      "headers": "object"
+    },
+    "required": [
+    ]
+  },
+  "formatting": {
+    "properties": {
+      "scheme": "string",
+      "options": "object"
+    },
+    "required": [
+      "scheme",
+      "options"
+    ]
+  },
   "lexIntent": {
     "properties": {
       "name": "string",