[nginxctl/tests/test_parser.py,requirements.txt] Fix Python 2.7 support

Author: SamuelMarks

nginxctl/tests/test_parser.py

@@ -21,7 +21,6 @@
 
 
 class TestParser(TestCase, object):
-    __name__ = (ast.Str if sys.version_info[0] == 2 else ast.Constant)('TestParser')
     maxDiff = 1200
 
     def setUp(self):
@@ -48,7 +47,7 @@ def setUp(self):
     def tearDown(self):
         rmtree(self.temp_dir)
 
-    @unittest.skip
+    @unittest.skip('')
     def test_filter_map_block(self):
         pp(self.nginx_conf_parse)
         for config in self.nginx_conf_parse["config"]:

requirements.txt

@@ -1,4 +1,4 @@
 crossplane
 boltons
-pyyaml
+pyyaml!=6.0.0,!=5.4.0,!=5.4.1
 meta