common: Used variable global_ssh_key_directory for public_keys path

roles/common/tasks/main.yml

@@ -30,7 +30,7 @@
 - name: Store ssh public key local
   copy:
     content: "{{ root_user.ssh_public_key }}\n"
-    dest: "public_keys/ssh/root@{{ inventory_hostname }}"
+    dest: "{{ global_ssh_key_directory }}/root@{{ inventory_hostname }}"
   delegate_to: localhost
   vars:
     ansible_become: no