Fix image fetching process for leap 15

The LXC image has a redirection that points to the right image.
We should use it, as aria2 handles it properly.

Change-Id: I61ce494055ab1f7f5bf3b205c34bb9bb131daba6

tasks/lxc_install_zypper.yml

@@ -63,14 +63,3 @@
     enabled: "yes"
   tags:
     - lxc_hosts-config
-
-- name: Determine latest openSUSE container build information (Leap 15)
-  # Leap 15.0
-  block:
-    # NOTE(hwoarang) The build ID changes all the time so we need to have a hack to determine the latest one
-    # TODO: Talk to openSUSE people to improve that and possibly use the same location for 42.3 as well.
-    - shell: |
-        curl -s {{ _lxc_hosts_container_image_url_base }} | grep -P -o '{{ ansible_architecture }}.*?lxc.*?Build.*?xz' | head -n 1
-      register: _lxc_opensuse_image_build_info
-    - set_fact:
-        _lxc_hosts_container_image_url: "{{ _lxc_hosts_container_image_url_base }}opensuse-leap-image.{{ _lxc_opensuse_image_build_info.stdout }}"

vars/suse.yml

@@ -15,8 +15,7 @@
 # limitations under the License.
 
 _lxc_hosts_container_image_url_base: "https://download.opensuse.org/repositories/Virtualization:/containers:/images:/openSUSE-Leap-{{ ansible_distribution_version }}/containers/"
-#this gets overriden anyway
+_lxc_hosts_container_image_url: "{{ _lxc_hosts_container_image_url_base }}opensuse-leap-image.x86_64-lxc.tar.xz"
-_lxc_hosts_container_image_url: ""
 
 _lxc_cache_map:
   distro: opensuse