Merge pull request #14855 from edx/benp/enable-crawler-on-prs

Enable pa11ycrawler on pull requests. It will only fail the build if …

scripts/accessibility-tests.sh

@@ -21,6 +21,9 @@ SELENIUM_BROWSER=phantomjs paver test_a11y --with-xunitmp
 echo "Generating coverage report..."
 paver a11y_coverage
 
+# Force the following if statement to always be true
+RUN_PA11YCRAWLER=1
+
 if [ "$RUN_PA11YCRAWLER" = "1" ]
 then
     # The settings that we use are installed with the pa11ycrawler module