Updates to clean up tests

Ignore links to localhost in tests

This org doesn't exist

Removing unmaintained app (returning 503)

Use `/ping` for tests since there is an option to disable stats

test/lint_test.rb

@@ -53,7 +53,7 @@ describe "lint test" do
       end
 
       it "host returns 200" do
-        uri = URI(data["host"] + '/probot/stats')
+        uri = URI(data["host"] + '/ping')
         res = Net::HTTP.get_response(uri)
         assert_equal "200", res.code, "Expected 200 response from #{uri}"
       end