Disable program details page a11y test

The tested page is currently disabled. This test will be re-enabled once a11y failures are resolved.

common/test/acceptance/tests/lms/test_programs.py

 """Acceptance tests for LMS-hosted Programs pages"""
+from unittest import skip
+
 from nose.plugins.attrib import attr
 
 from ...fixtures.programs import ProgramsFixture, ProgramsConfigMixin
@@ -137,6 +139,7 @@ class ProgramListingPageA11yTest(ProgramPageBase):
 
 
 @attr('a11y')
+@skip('The tested page is currently disabled. This test will be re-enabled once a11y failures are resolved.')
 class ProgramDetailsPageA11yTest(ProgramPageBase):
     """Test program details page accessibility."""
     def setUp(self):