Iterate over list of values of PPC packages dict

Currently as we are iterating over a higher level dictionary
and it is not possible to access the item.value.url attribute
directly.

Alternatively, we could get the values that is a list and
then iterate over that list to get properly the url and
checksum variables.

Also, we are not iterating over the dictionary we alternatively change
the item.key to galera_server_percona_distro_packages_alt_arch.keys()[0]
that produces the result as item.key.

Change-Id: I3e102377630d9c8ea5c9e3ea03cae3975a05dbb8
Closes-Bug: #1815902

tasks/galera_install_download_extra_packages.yml

@@ -22,12 +22,12 @@
 
 - name: Download extra packages
   get_url:
-    url: "{{ item.value.url }}"
-    dest: "{{ galera_server_extra_package_path }}/{{ item.key }}/"
-    checksum: "{{ item.value.checksum | default(omit) }}"
-    force: "{{ item.value.checksum is not defined }}"
+    url: "{{ item.url }}"
+    dest: "{{ galera_server_extra_package_path }}/{{ galera_server_percona_distro_packages_alt_arch.keys()[0] }}/"
+    checksum: "{{ item.checksum | default(omit) }}"
+    force: "{{ item.checksum is not defined }}"
     validate_certs: "{{ galera_server_extra_package_validate_certs }}"
-  with_dict: "{{ galera_server_percona_distro_packages_alt_arch }}"
+  with_items: "{{ galera_server_percona_distro_packages_alt_arch.values() | flatten | list }}"
   register: fetch_url
   until: fetch_url is success
   retries: 3