Adjust yast control center test module as ca mgmt was dropped

yast2-ca-mgmt was dropped, see
[fate#319119](https://fate.suse.com/319119).
See [poo#31648](https://progress.opensuse.org/issues/31648).

tests/yast2_gui/yast2_control_center.pm

@@ -298,9 +298,9 @@ sub run {
         # kdump is disabled by default, so ensure that it's installed
         ensure_installed 'yast2-kdump';
         record_soft_failure 'bsc#1059569';
-        # see bsc#1062331, sound is not added to the yast2 pattern
-        # also add missing yast2-ca-management and yast2-auth-server
-        ensure_installed 'yast2-sound yast2-ca-management yast2-auth-server';
+        # sound and auth-server are not added to the yast2 pattern
+        ensure_installed 'yast2-sound yast2-auth-server';
+        record_soft_failure 'bsc#1062331';
     }
     $self->launch_yast2_module_x11('', target_match => 'yast2-control-center-ui', match_timeout => 180);
 
@@ -330,11 +330,13 @@ sub run {
     if (is_sle) {
         start_add_system_extensions_or_modules;
         start_kernel_dump;
-        start_common_server_certificate;
-        start_ca_management;
         start_wake_on_lan;
         # available by default only on SLES
         start_authentication_server;
+        unless (sle_version_at_least '15') {
+            start_common_server_certificate;
+            start_ca_management;
+        }
     }
     if (check_var('DISTRI', 'opensuse')) {
         start_kernel_settings;