Use TaskRouterClient in test for realism

Author: philnash

spec/rest/task_router/statistics_spec.rb

@@ -25,9 +25,9 @@ def initialize(path, client)
   end
 
   it "passes parameters to the HTTP request for statistics" do
-    client = Twilio::REST::Client.new 'someSid', 'someAuthToken'
+    client = Twilio::REST::TaskRouterClient.new 'someSid', 'someAuthToken', 'someWorkspaceSid'
     allow(Net::HTTP::Get).to receive(:new)
-      .with("/test/harness/Statistics.json?Minutes=15", Twilio::REST::BaseClient::HTTP_HEADERS)
+      .with("/test/harness/Statistics?Minutes=15", Twilio::REST::BaseClient::HTTP_HEADERS)
       .and_call_original
     harness = StatisticsTestHarness.new("/test/harness", client)
     expect(harness.statistics(minutes: 15)).to(