If Ansible hostvars contain a pipe (|) character, this can cause
problems during scheduling as Ansible fails during Jinja templating.
This is probably a bug in Ansible/Jinja.
The particular case where this was hit was when using screen, the
TERMCAP environment variable gets set to something beginning with
'SC|screen|VT'.
This change addresses the issue by moving the capture of hostvars inside
the tenks_update_state action plugin rather than evaluating them in a
playbook.
Change-Id: Ibef91d9ef499c8741b61a170672a23f530a600bb
8df4a68fb1