Prepare docker tests for AZP. (#1482)

Backport of important parts of https://github.com/ansible-collections/community.docker/pull/48 to stable-1.

tests/integration/targets/setup_docker/tasks/RedHat-7.yml

@@ -42,4 +42,4 @@
   service:
     name: docker
     state: started
-  ignore_errors: "{{ ansible_virtualization_type == 'docker' }}"
+  ignore_errors: "{{ ansible_virtualization_type in ['docker', 'container', 'containerd'] }}"

tests/integration/targets/setup_docker/tasks/RedHat-8.yml

@@ -31,4 +31,4 @@
   service:
     name: docker
     state: started
-  ignore_errors: "{{ ansible_virtualization_type == 'docker' }}"
+  ignore_errors: "{{ ansible_virtualization_type in ['docker', 'container', 'containerd'] }}"

tests/integration/targets/setup_docker/tasks/main.yml

@@ -135,3 +135,16 @@
             images: "{{ docker_images.stdout_lines | default([]) }}"
 
       when: docker_cli_version is version('0.0', '>')
+
+    - name: Detect whether we are running inside a container
+      current_container_facts:
+
+    - name: Inspect current container
+      docker_container_info:
+        name: "{{ ansible_module_container_id }}"
+      register: current_container_info
+      when: ansible_module_running_in_container
+
+    - name: Determine network name
+      set_fact:
+        current_container_network_ip: "{{ (current_container_info.container.NetworkSettings.Networks | dictsort)[0].0 | default('') if ansible_module_running_in_container else '' }}"