Disable Django API browser and bump pa11ycrawler

Force run on PR for testing

Remove pa11ycrawler from base.txt for testing

Update pa11ycrawler dependency

Revert code needed for testing on Jenkins

Enable testing for Jenkins

Update accessibility-tests.sh

Update accessibility-tests.sh

Point to newest pa11ycrawler release

Remove force run on PR

Reset accessibility-tests.sh

lms/envs/common.py

@@ -2187,6 +2187,9 @@ CSRF_COOKIE_SECURE = False
 
 REST_FRAMEWORK = {
     'DEFAULT_PAGINATION_CLASS': 'openedx.core.lib.api.paginators.DefaultPagination',
+    'DEFAULT_RENDERER_CLASSES': (
+        'rest_framework.renderers.JSONRenderer',
+    ),
     'PAGE_SIZE': 10,
     'URL_FORMAT_OVERRIDE': None,
     'DEFAULT_THROTTLE_RATES': {

requirements/edx/base.txt

@@ -166,7 +166,7 @@ nose-exclude
 nose-ignore-docstring
 nose-randomly==1.2.0
 nosexcover==1.0.7
-pa11ycrawler==1.6.1
+pa11ycrawler==1.6.2
 pep8==1.5.7
 PyContracts==1.7.1
 python-subunit==0.0.16