[skolo] Make `restart` var on install_test_machine_monitor work.

You've got to be root to reboot, at least on POSIX.

Also revert my "warn" change; despite Ansible warning that I need to
add "warn", it doesn't tolerate it.
Change-Id: I96efb4e421de3c8bfa035d010348099d9d299a60
Reviewed-on: https://skia-review.googlesource.com/c/buildbot/+/565196
Commit-Queue: Joe Gregorio <jcgregorio@google.com>
Reviewed-by: Joe Gregorio <jcgregorio@google.com>
Auto-Submit: Erik Rose <erikrose@google.com>
diff --git a/skolo/ansible/switchboard/install_test_machine_monitor.yml b/skolo/ansible/switchboard/install_test_machine_monitor.yml
index 2efa0e7..345f1fe 100644
--- a/skolo/ansible/switchboard/install_test_machine_monitor.yml
+++ b/skolo/ansible/switchboard/install_test_machine_monitor.yml
@@ -18,5 +18,6 @@
       when: restart and ansible_facts['system']|lower in ['win32nt']
 
     - name: Reboot non-Windows host.
+      become: true
       reboot:
       when: restart and ansible_facts['system']|lower not in ['win32nt']
diff --git a/skolo/ansible/switchboard/roles/get_ansible_binaries/tasks/main.yml b/skolo/ansible/switchboard/roles/get_ansible_binaries/tasks/main.yml
index c56753c..4b1acf4 100644
--- a/skolo/ansible/switchboard/roles/get_ansible_binaries/tasks/main.yml
+++ b/skolo/ansible/switchboard/roles/get_ansible_binaries/tasks/main.yml
@@ -15,7 +15,6 @@
     'curl --silent --cookie ~/.gitcookies
     https://skia.googlesource.com/a/k8s-config/+/refs/heads/main/ansible-tags/{{
     get_ansible_binaries_application }}/version.txt?format=TEXT | base64 -d'
-  warn: false
 
 - name: Download to the temp dir the specified version of the binaries.
   run_once: true