Update MasterQA example tests

Author: mdmintz

examples/master_qa/basic_masterqa_test.py

@@ -6,7 +6,7 @@ class MasterQATests(MasterQA):
     def test_masterqa(self):
         self.open("https://xkcd.com/1700/")
         self.verify("Do you see a webcomic?")
-        self.highlight_click("link=Store")
+        self.open("https://store.xkcd.com/collections/everything")
         self.highlight_click('[title="things for walls"]')
         self.verify('Do you see posters for sale?')
         self.highlight_update_text("input.search-input", "book\n")

examples/master_qa/masterqa_test.py

@@ -16,7 +16,7 @@ def test_xkcd(self):
         self.verify("Can you find the moon?")
         self.click('a[rel="next"]')
         self.verify("Do the drones look safe?")
-        self.click_link_text('Store')
+        self.open("https://store.xkcd.com/collections/everything")
         self.update_text("input.search-input", "book\n")
         self.verify("Do you see books in the search results?")
         self.open("https://xkcd.com/213/")