Allow override of the repo filename

Apt cannot have 2 mirrors with the same content in 2 different files.
If a deployer has an apt mirror with uca, the deployer
still need to add a repository, but will also need to define the
filename used, in order to avoid clashes.

This commit makes possible to decide the filename for the repo.

Change-Id: I05c57fe1e43c15757797ff4ad6a2acf39441cb50
Signed-off-by: Jean-Philippe Evrard <jean-philippe.evrard@rackspace.co.uk>

defaults/main.yml

@@ -480,6 +480,7 @@ neutron_local_ip: 127.0.0.1
 neutron_uca_enable: True
 # Ubuntu Cloud Archive mirror URL
 uca_apt_repo_url: "http://ubuntu-cloud.archive.canonical.com/ubuntu"
+uca_apt_source_list_filename: "ubuntu_cloud_archive_canonical_com_ubuntu"
 
 # When running in an AIO, we need to implement an iptables rule in any
 # neutron_agent containers to that ensure instances can communicate with

releasenotes/notes/apt-source-filenamed-2cc698add82f5eea.yaml

@@ -0,0 +1,5 @@
+---
+features:
+  - The filename of the apt source for the ubuntu
+    cloud archive can now be defined with the
+    variable ``uca_apt_source_list_filename``.

tasks/neutron_install.yml

@@ -36,6 +36,7 @@
     repo: "{{ uca_repo }}"
     state: present
     update_cache: yes
+    filename: "{{ uca_apt_source_list_filename }}"
   register: neutron_uca_add_repo
   when:
     - neutron_uca_enable