Remove commas in filename (#6692)

This will immediately address the breakage reported in #6682 and tracked at #6685. Pip 19.0.0 and 19.0.1 don't allow commas in filenames, so don't use commas in filenames in certbot-apache test code.

I've confirmed that this fixes the issue on a machine that fails with the version of certbot-auto currently in master: recent version of virtualenv, python 2.7.

Steps to test:

push master to test box
run tools/venv.py
activate venv
pip --version: 19.0.1
pip install ./certbot-apache/: fails
push branch code to test box
confirm pip --version still 19.0.1
pip install ./certbot-apache/: success

* Rename old,default.conf to old-and-default.conf

* Update changelog

* sites-enabled should contain a symlink to sites-available

certbot-apache/certbot_apache/tests/configurator_test.py

@@ -1523,12 +1523,12 @@ class AugeasVhostsTest(util.ApacheTest):
     def test_choosevhost_with_illegal_name(self):
         self.config.aug = mock.MagicMock()
         self.config.aug.match.side_effect = RuntimeError
-        path = "debian_apache_2_4/augeas_vhosts/apache2/sites-available/old,default.conf"
+        path = "debian_apache_2_4/augeas_vhosts/apache2/sites-available/old-and-default.conf"
         chosen_vhost = self.config._create_vhost(path)
         self.assertEqual(None, chosen_vhost)
 
     def test_choosevhost_works(self):
-        path = "debian_apache_2_4/augeas_vhosts/apache2/sites-available/old,default.conf"
+        path = "debian_apache_2_4/augeas_vhosts/apache2/sites-available/old-and-default.conf"
         chosen_vhost = self.config._create_vhost(path)
         self.assertTrue(chosen_vhost == None or chosen_vhost.path == path)
 

certbot-apache/certbot_apache/tests/testdata/debian_apache_2_4/augeas_vhosts/apache2/sites-enabled/old,default.conf

@@ -1 +0,0 @@
-../sites-available/old,default.conf

certbot-apache/certbot_apache/tests/testdata/debian_apache_2_4/augeas_vhosts/apache2/sites-enabled/old-and-default.conf

@@ -0,0 +1 @@
+../sites-available/old-and-default.conf