improvement: use Arsenal error messages

lib/UtapiClient.js

@@ -998,6 +998,7 @@ class UtapiClient {
         this._checkMetricTypes(params);
         const action = (updateSize < 0) ? 'decrby' : 'incrby';
         const size = (updateSize < 0) ? -updateSize : updateSize;
+        log.info('UTAPI DEBUG!!!', { action, size, updateSize });
         return this.ds[action](generateKey(params, 'locationStorage'), size,
             err => {
                 if (err) {
@@ -1005,8 +1006,7 @@ class UtapiClient {
                         method: 'UtapiClient.pushLocationMetric',
                         error: err,
                     });
-                    return this._pushLocalCache(params, 'locationStorage', null,
-                        log, callback);
+                    return callback(errors.InternalError);
                 }
                 return callback();
             });
@@ -1033,7 +1033,7 @@ class UtapiClient {
                     method: 'UtapiClient: getLocationMetric',
                     error: err,
                 });
-                return callback(err);
+                return callback(errors.InternalError);
             }
             // if err and bytesStored are null, key does not exist yet
             if (bytesStored === null) {