Change to not fetch rates since before the fix cause they will not be correct anyway

Author: AndreasLarssons

lib/fiatrateservice.js

@@ -116,6 +116,14 @@ FiatRateService.prototype.getRate = function(opts, cb) {
   var provider = opts.provider || self.defaultProvider;
   var ts = (_.isNumber(opts.ts) || _.isArray(opts.ts)) ? opts.ts : now;
 
+  if (new Date(ts) < Date.parse("2018-12-13")) {
+    return cb(null, {
+      ts: ts,
+        rate: undefined,
+        fetchedOn: undefined
+    });
+  }
+
   async.map([].concat(ts), function(ts, cb) {
     self.storage.fetchFiatRate(provider, opts.code, ts, function(err, rate) {
       if (err) return cb(err);