The project-formely-known as Akanda has moved to openstack/ and is to be
renamed Astara. This is the final phase of the project move+rename.
This patch renames:
- openstack/akanda-rug -> openstack/astara
- openstack/akanda-appliance -> openstack/astara-appliance
- openstack/akanda-horizon -> openstack/astara-horizon
- openstatck/akanda-neutron -> openstack/astara-neutron
It also renames gerrit groups:
- akanda-core -> astara-core
- akanda-release -> astara-release
As part of the rename, it also retires two unused repos to openstack-attic:
- akanda
- akanda-appliance-builder
Jenkins jobs and zuul layouts updated accordingly.
Change-Id: I3d64946d00cf7fd9c8dce725c56b83e256a6fd11
be7dfc521f