Integration tests: split up Docker setup, move docker_compose tests into own group (#718)

* Rename setup role.

* Create new CI group 6, and move docker_compose v1 tests into there.

* Split up Docker setup in integration tests.

* Change setup_docker_compose_v1 to install its own Docker SDK for Python.

* Docker SDK for Python not needed to set up registry or query host info.

tests/integration/targets/generic_ssh_connection/meta/main.yml

@@ -6,3 +6,4 @@
 dependencies:
   - setup_docker
   - setup_paramiko
+  - setup_docker_python_deps

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

@@ -68,7 +68,6 @@
     docker_host: "ssh://root@localhost"
     use_ssh_client: true
   register: output
-  ignore_errors: true
 
 - name: Make sure we got information
   assert:
@@ -80,11 +79,3 @@
       - 'output.volumes is not defined'
       - 'output.images is not defined'
       - 'output.disk_usage is not defined'
-  when: docker_py_version is version('4.4.0', '>=')
-
-- name: Make sure we got information
-  assert:
-    that:
-      - output is failed
-      - "'use_ssh_client=True requires Docker SDK for Python 4.4.0 or newer' in output.msg"
-  when: docker_py_version is version('4.4.0', '<')