This installs Ansible 2.7.3 on bridge.o.o to incorporate fixes for [1]
which is currently stopping the cloud-launcher from running.
Currently every run it hits citycloud Lon1 and tries to delete it's
router
TASK [cloud-launcher : Processing router openstackci-router1 for openstackci-citycloud Lon1] ***
Monday 12 November 2018 04:07:48 +0000 (0:00:00.430) 0:07:45.811 *******
fatal: [localhost]: FAILED! => {"changed": false, "msg": "Error
detaching interface from router c7197a8f-096a-4488-a3ae-16fdce0ea580
... cannot be deleted, as it is required by one or more floating
IPs."}
Although it doesn't succeed, it's probably better that it isn't even
trying...
A prior version of this installed the unreleased stable branch to
bring this in, but didn't end up with enough reviews. I've left
behind how to do that as a breadcrumb should we need to do similar in
the future (we do seem to have a nack of tickling Ansible bugs :)
[1] 951572bec1
Change-Id: I8f112ba994040c52c7b3c7ee6fd6f5a69fd22919
77acd56dc7