Use studio_view argument with Xblock-utils.

Also make one of the tests that used Python literals use JSON while XBlock is in flux.

tests/integration/test_studio.py

@@ -24,7 +24,7 @@ class StudioTest(PollBaseTest):
         """
         Verify we can add more than one item and they both save.
         """
-        self.go_to_page(page_name, studio=True)
+        self.go_to_page(page_name, view_name='studio_view')
         add_item_button = self.browser.find_element_by_css_selector('#poll-add-%s' % item_type)
         # Add two answers
         add_item_button.click()

tests/integration/xml/poll_one_picture.xml

 <poll tally="{'red': 20, 'fennec': 29, 'kit': 15, 'arctic' : 35}"
       question="## What is your favorite kind of fox?"
-      answers="[['red', {'label': 'Red Fox', 'img': None}], ['fennec', {'label': 'Fennec Fox', 'img': '../img/fennec_fox.png'}], ['kit', {'label': 'Kit Fox', 'img': None}], ['arctic', {'label': 'Arctic fox', 'img': None}]]" />
+      answers='[["red", {"label": "Red Fox", "img": null}], ["fennec", {"label": "Fennec Fox", "img": "../img/fennec_fox.png"}], ["kit", {"label": "Kit Fox", "img": null}], ["arctic", {"label": "Arctic fox", "img": null}]]' />

tests/integration/xml/survey_studio.xml

 <survey tally='{"q1": {"sa": 5, "a": 5, "n": 3, "d": 2, "sd": 5}, "q2": {"sa": 3, "a": 2, "n": 3, "d": 10, "sd": 2}, "q3": {"sa": 2, "a": 7, "n": 1, "d": 4, "sd": 6}, "q4": {"sa": 1, "a": 2, "n": 8, "d": 4, "sd": 5}}'
         questions='[["q1", {"label": "I feel like this test will pass.", "img": null}], ["q2", {"label": "I like testing software", "img": null}], ["q3", {"label": "Testing is not necessary", "img": null}], ["q4", {"label": "I would fake a test result to get software deployed.", "img": null}]]'
         answers='[["sa", "Strongly Agree"], ["a", "Agree"], ["n", "Neutral"], ["d", "Disagree"], ["sd", "Strongly Disagree"]]'
-        choices='{"q1": "}'
         feedback="### Thank you&#10;&#10;for running the tests."/>