ipatests: Clean up existing ACME registration and certs

The same base class is used for ACME setup and configuration.
Be sure to clean up any existing registraton prior to continuing
otherwise ACME register will complain.

https://pagure.io/freeipa/issue/8581

Signed-off-by: Rob Crittenden <rcritten@redhat.com>
Reviewed-By: Florence Blanc-Renaud <frenaud@redhat.com>
Reviewed-By: Mohammad Rizwan <myusuf@redhat.com>
Reviewed-By: Armando Neto <abiagion@redhat.com>

ipatests/test_integration/test_acme.py

@@ -197,6 +197,19 @@ class TestACME(CALessBase):
 
     @pytest.mark.skipif(skip_certbot_tests, reason='certbot not available')
     def test_certbot_register(self):
+        # clean up any existing registration and certificates
+        self.clients[0].run_command(
+            [
+                'rm', '-rf',
+                '/etc/letsencrypt/accounts',
+                '/etc/letsencrypt/archive',
+                '/etc/letsencrypt/csr',
+                '/etc/letsencrypt/keys',
+                '/etc/letsencrypt/live',
+                '/etc/letsencrypt/renewal',
+                '/etc/letsencrypt/renewal-hooks'
+            ]
+        )
         # service is enabled; registration should succeed
         self.clients[0].run_command(
             [