CI: molecule fixes

- use become: true when running bootstrap-os in molecule
- match host name in bastion-ssh-config to not confuse the provisionner

roles/bastion-ssh-config/molecule/default/molecule.yml

@@ -3,7 +3,7 @@ role_name_check: 1
 dependency:
   name: galaxy
 platforms:
-  - name: ubuntu20
+  - name: bastion-01
     cloud_image: ubuntu-2004
     vm_cpu_cores: 1
     vm_memory: 512