use correct boolean values

roles/cleanup/tasks/main.yml

@@ -24,7 +24,7 @@
     hostname: "{{ hypervisor_url }}"
     username: "{{ hypervisor_username }}"
     password: "{{ hypervisor_password }}"
-    validate_certs: no
+    validate_certs: false
     datacenter: "{{ hypervisor_cluster }}"
     name: "{{ hostname }}"
     cdrom:
@@ -72,4 +72,4 @@
     - name: Wait for VM to boot up
       delegate_to: "{{ inventory_hostname }}"
       wait_for_connection:
-        timeout: 300
+        timeout: 300