neutron/undercloud: Unable to find subnet with name or id

[Emilien Macchi]

Trying to promote TripleO CI to latest Ocata packages, but it now fails on listing Neutron networks:
http://logs.openstack.org/15/359215/44/check/gate-tripleo-ci-centos-7-nonha-multinode/6d3e2d6/console.html#_2017-01-29_16_32_48_821684

[Gabriele Cerami (gcerami)]

this is also affecting all the CI periodic jobs on master

[Gabriele Cerami (gcerami)]

Not sure what's happening. We are using a very fragile way to gather the subnet id for the network parsing the neutron net-list table, that is based on a huge assumption: ctlplane must be the longest name on the column "name".
Maybe something not very controllable altered the table, and we are unable to get the proper UUID.
proposed https://review.openstack.org/426716.
seems to be working at least for ocata

[Gabriele Cerami (gcerami)]

deployment advances up to a certain point where it fails with a similar error involving neutronclient command.
proposed also https://review.openstack.org/427083 to fix that.