replace_node.yml: Start manager-agent and disable RBNO only for the n…

…ew node

These tasks shouldn't be touching other nodes besides the one being added

example-playbooks/replace_node/replace_node.yml

@@ -327,6 +327,7 @@
         state: restarted
         enabled: yes
       become: true
+      when: inventory_hostname == new_node
 
     - name: Re-enable RBNO for the new node
       block:
@@ -341,7 +342,7 @@
           shell: |
             pkill -1 scylla$
       become: true
-      when: disable_rbno|bool and _rbno_enabled is defined and _rbno_enabled|bool
+      when: inventory_hostname == new_node and disable_rbno|bool and _rbno_enabled is defined and _rbno_enabled|bool
 
 
 - name: Resume scylla-manager tasks