We are seeing:
fatal: [adns1.opendev.org]: FAILED! => {"msg": "The task includes an
option with an undefined variable. The error was:
'ansible.vars.hostvars.HostVarsVars object' has no attribute
'acme_txt_required'
I belive this is because we have a disabled mirror host now. So the
iad.rx.opendev.org mirror is in the "letsencrypt" group, but because
it is also disabled the prior role (letsencrypt-request-certs) has not
run and it has not populated it's "acme_txt_required" variable.
We should skip disabled hosts when inspecting the hosts for this
variable. Add this to the "with_inventory_hostnames" match.
Change-Id: I33a1c8b6f7e8499248e370f69a9f573a2bf106a5
b742bfc911