Add basic podman tests to CI (#1040)

* Setup podman and run some basic tests with it.

* Clean up Docker setup.

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

@@ -13,3 +13,26 @@
 
 - fail: msg="Too old docker / docker-py version to run docker_host_info tests!"
   when: not(docker_api_version is version('1.25', '>=')) and (ansible_distribution != 'CentOS' or ansible_distribution_major_version|int > 6)
+
+- when: podman_cli_version is version('1.0.0', '>=')
+  block:
+    - name: Get Podman context
+      community.docker.docker_context_info:
+        name: podman
+      register: docker_podman_context
+
+    - name: Run tests with Podman context
+      module_defaults:
+        group/community.docker.docker: "{{ docker_podman_context.contexts[0].config }}"
+      block:
+
+        - name: Get info on Podman host
+          docker_host_info:
+          register: output
+
+        - name: Check for some Podman specific values
+          assert:
+            that:
+              - output.host_info.ProductLicense == 'Apache-2.0'
+              - >-
+                "Rootless" in output.host_info