Use port 1022 for all cluster nodes as SSH-port and fix some config-errors

I'm oversaw completely, that I have to change the SSH-port for all nodes
in the cluster otherwise I cannot provide a meaningful load-balancer for
the git-ssh port in it.

Additionally this allowed me to fix some config errors which I simply
oversaw.

roles/server-setup/handlers/main.yml

@@ -1,7 +1,8 @@
 - name: Restart sshd
-  service:
-    name: ssh
+  systemd_service:
+    name: ssh.socket
     state: restarted
+    daemon_reload: true
 
 - name: Start ip-masquerade
   script: "{{ ip_masquerade_path }}/{{ ip_masquerade_script }}"

roles/server-setup/tasks/main.yml

@@ -28,6 +28,11 @@
   when: target_ssh.unreachable is defined and
         target_ssh.unreachable == True
 
+- name: Ensure SSH is reloaded
+  meta: flush_handlers
+  when: target_ssh.unreachable is defined and
+        target_ssh.unreachable == True
+
 - name: Reset ansible_port to configured value
   set_fact:
     ansible_port: "{{ target_ansible_port }}"