Fix playbook syntax in base post playbook
Er, plays aren't separated by documents.  A playbook is a list
of plays.
- hosts: all
roles:
- collect-logs
----
+
- hosts: localhost
tasks:
- name: Add log server ssh key.
add_host:
name: static.openstack.org
groups: zuul_logserver
----
+
- hosts: zuul_logserver
roles:
- upload-logs
