CI: Use UCA mirror for Ubuntu

Change-Id: I80070b3c3658948c7157564fb8a79e6dd427f1d1
Signed-off-by: Michal Nasiadka <[email protected]>

Author: mnasiadka

tests/templates/template_overrides.j2

@@ -57,6 +57,7 @@ RUN sed -i -e "s|http://deb.debian.org|[trusted=yes] http://{{ nodepool_mirror_h
 
 RUN sed -i -e "s|mirror://mirrors.ubuntu.com/mirrors.txt|[trusted=yes] http://{{ nodepool_mirror_host }}/ubuntu/|" \
         -e "s|http://ports.ubuntu.com|[trusted=yes] http://{{ nodepool_mirror_host }}/ubuntu-ports|" \
+        -e "s|http://ubuntu-cloud.archive.canonical.com/ubuntu|[trusted=yes] http://{{ nodepool_mirror_host }}/ubuntu-cloud-archive|" \
         /etc/apt/sources.list
 
 {% endif %}