added conjunctive test case for root to task conditional and fixed copy module's valdation string argument

roles/init-server/tasks/harden.yml

@@ -2,7 +2,7 @@
 ---
 # tasks file for roles/init-vps
 - name: Checking whether administrative login used
-  when: ansible_user not in (admins | map(attribute="username") | list)
+  when: ansible_user not in (admins | map(attribute="username") | list) and ansible_user != "root"
   ansible.builtin.fail:
     msg: Must use administrative user for subsequent tasks
 - name: Hardening SSH service for the Linode VPS
@@ -14,5 +14,5 @@
     mode: "644"
     force: true
     backup: true
-    validate: "sshd -t %s"
+    validate: 'sshd -t -f %s'
   register: ssh_hardened