Introduce IDENTITY_REQUEST error code and update error logging for identity requests

Author: alexs-mparticle

src/identityApiClient.ts

@@ -306,7 +306,7 @@ export default function IdentityAPIClient(
 
             Logger.error(
                 'Error sending identity request to servers' + ' - ' + errorMessage,
-                ErrorCodes.UNHANDLED_EXCEPTION
+                ErrorCodes.IDENTITY_REQUEST
             );
             invokeCallback(
                 callback,

src/logging/errorCodes.ts

@@ -5,4 +5,5 @@ export type ErrorCodes = valueof<typeof ErrorCodes>;
 export const ErrorCodes = {
     UNKNOWN_ERROR: 'UNKNOWN_ERROR',
     UNHANDLED_EXCEPTION: 'UNHANDLED_EXCEPTION',
+    IDENTITY_REQUEST: 'IDENTITY_REQUEST',
 } as const;