Don't use the has_files() to know if client/server is configured

Use the is_ipa_configure() and is_ipa_client_configured() utilities
instead which are much more robust.

https://pagure.io/freeipa/issue/8384

Signed-off-by: Rob Crittenden <rcritten@redhat.com>
Reviewed-By: Alexander Bokovoy <abokovoy@redhat.com>
Reviewed-By: Francois Cami <fcami@redhat.com>

ipaclient/install/ipa_certupdate.py

@@ -26,7 +26,8 @@ import shutil
 
 from urllib.parse import urlsplit
 
-from ipalib.install import certmonger, certstore, sysrestore
+from ipalib.install import certmonger, certstore
+from ipalib.facts import is_ipa_configured
 from ipalib.install.kinit import kinit_keytab
 from ipapython import admintool, certdb, ipaldap, ipautil
 from ipaplatform import services
@@ -104,8 +105,7 @@ def run_with_args(api):
             os.environ['KRB5CCNAME'] = old_krb5ccname
         shutil.rmtree(tmpdir)
 
-    server_fstore = sysrestore.FileStore(paths.SYSRESTORE)
-    if server_fstore.has_files():
+    if is_ipa_configured():
         # look up CA servers before service restarts
         resp = api.Command.server_role_find(
             role_servrole=u'CA server',