Fix 'list' incompatibility with galaxy in ansible<2.10 (#95)

_dependencies/tasks/main.yml

@@ -38,9 +38,10 @@
         that: "(ansible_version.full is version('2.9.6', '>=') and ansible_version.full is version('2.10.6', '<='))  or  ('community.aws' in galaxy_collections  and  galaxy_collections['community.aws'].version is version('1.5.0', '>='))"
         fail_msg: "If Ansible > 2.9.6 then community.aws > 1.5.0 is required for valid community.aws.route53 support (by default in Ansible v4)."
       vars:
+        _galaxy_lookup: "{{ lookup('pipe', 'ansible-galaxy collection list', errors='ignore') }}"
         galaxy_collections: |-
           {% set res = {} -%}
-          {%- for sub in (lookup('pipe', 'ansible-galaxy collection list')).split('\n') | map('trim') | map('regex_replace', '\\s+', ' ') -%}
+          {%- for sub in (_galaxy_lookup | ternary(_galaxy_lookup, '') | trim).split('\n') | map('trim') | map('regex_replace', '\\s+', ' ') | select | list -%}
             {% set _ = res.update({sub.split(' ')[0]: {'version': sub.split(' ')[1]|default('')}}) -%}
           {%- endfor %}
           {{ res }}