Fix problem with disabled SSH password login

As this problem appeared on Tumbleweed where the new directory
`/etc/ssh/sshd_config.d/` is in place I'm checking for it.

tests/network/setup_multimachine.pm

@@ -17,7 +17,7 @@ use testapi;
 use lockapi;
 use mm_network 'setup_static_mm_network';
 use utils 'zypper_call';
-use Utils::Systemd 'disable_and_stop_service';
+use Utils::Systemd qw(disable_and_stop_service systemctl);
 use version_utils qw(is_sle is_opensuse);
 
 sub is_networkmanager {
@@ -60,14 +60,22 @@ sub run {
             assert_script_run "nmcli connection up '$nm_id'";
         }
         else {
-            assert_script_run 'systemctl restart  wicked';
+            systemctl("restart wicked");
         }
     }
 
     # Set the hostname to identify both minions
     assert_script_run "hostnamectl set-hostname $hostname";
     assert_script_run "hostnamectl status|grep $hostname";
     assert_script_run "hostname|grep $hostname";
+
+    # Make sure that PermitRootLogin is set to yes
+    # This is needed only when the new SSH config directory exists
+    # See: poo#93850
+    if (script_run("test -d /etc/ssh/sshd_config.d") == 0) {
+        assert_script_run "echo 'PermitRootLogin yes' > /etc/ssh/sshd_config.d/PermitRootLogin.conf";
+        systemctl("restart sshd");
+    }
 }
 
 1;