Add pa11y_ignore_rules_url to `paver pa11ycrawler`

pavelib/paver_tests/test_paver_bok_choy_cmds.py

@@ -201,6 +201,11 @@ class TestPaverPa11yCrawlerCmd(unittest.TestCase):
         suite = Pa11yCrawler(
             'pa11ycrawler', course_key="course-v1:edX+Test101+course",
         )
+        ignore = (
+            "pa11y_ignore_rules_url="
+            "https://raw.githubusercontent.com/singingwolfboy/"
+            "pa11ycrawler-ignore/master/ignore.yaml"
+        )
         expected_cmd = [
             "scrapy",
             "crawl",
@@ -210,6 +215,8 @@ class TestPaverPa11yCrawlerCmd(unittest.TestCase):
             "-a",
             "course_key=course-v1:edX+Test101+course",
             "-a",
+            ignore,
+            "-a",
             "data_dir=/edx/app/edxapp/edx-platform/reports/pa11ycrawler/data",
         ]
         actual_cmd = suite.cmd

pavelib/utils/test/suites/bokchoy_suite.py

@@ -395,6 +395,7 @@ class Pa11yCrawler(BokChoyTestSuite):
         Runs pa11ycrawler as staff user against the test course.
         """
         data_dir = os.path.join(self.report_dir, 'data')
+        url = "https://raw.githubusercontent.com/singingwolfboy/pa11ycrawler-ignore/master/ignore.yaml"
         return [
             "scrapy",
             "crawl",
@@ -404,5 +405,7 @@ class Pa11yCrawler(BokChoyTestSuite):
             "-a",
             "course_key={key}".format(key=self.course_key),
             "-a",
+            "pa11y_ignore_rules_url={url}".format(url=url),
+            "-a",
             "data_dir={dir}".format(dir=data_dir)
         ]