Add legacy configure_ssl

Add legacy configure_ssl to octavia_handlers
Pin pyparsing to 2.4.2 in wheelhouse.txt
Update render unit test

Closes-Bug: 1851487
Change-Id: I4dd055d43e62556692dca3f58f255769dab95287

src/reactive/octavia_handlers.py

@@ -153,6 +153,7 @@ def render(*args):
     """
     with charm.provide_charm_instance() as octavia_charm:
         octavia_charm.render_with_interfaces(args)
+        octavia_charm.configure_ssl()
         octavia_charm.enable_webserver_site()
         octavia_charm.assess_status()
     reactive.set_state('config.rendered')

src/wheelhouse.txt

@@ -4,5 +4,7 @@ python-novaclient
 python-neutronclient
 # tactical fix for https://github.com/celery/kombu/issues/1105
 amqp==2.5.1
+# REMOVEME -- fix for https://github.com/pyparsing/pyparsing/issues/164
+pyparsing==2.4.2
 neutron_lib
 pytest-runner

unit_tests/test_octavia_handlers.py

@@ -150,6 +150,8 @@ class TestOctaviaHandlers(test_utils.PatchHelper):
         handlers.render('arg1', 'arg2')
         self.octavia_charm.render_with_interfaces.assert_called_once_with(
             ('arg1', 'arg2'))
+        self.octavia_charm.configure_ssl.assert_called_once_with()
+        self.octavia_charm.enable_webserver_site.assert_called_once_with()
         self.octavia_charm.assess_status.assert_called_once_with()
         self.set_state.assert_called_once_with('config.rendered')