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/setup_docker_registry/aliases

@@ -3,4 +3,5 @@
 # SPDX-License-Identifier: GPL-3.0-or-later
 
 needs/target/setup_docker
+needs/target/setup_docker_current_container_network_ip
 needs/target/setup_openssl

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

@@ -5,5 +5,7 @@
 
 dependencies:
   #- setup_docker  -- done in setup.yml, to work around cleanup problems!
+  #- setup_docker_current_container_network_ip
+  - setup_docker_python_deps
   - setup_openssl
   - setup_remote_tmp_dir

tests/integration/targets/setup_docker_registry/tasks/setup.yml

@@ -16,6 +16,10 @@
   include_role:
     name: setup_docker
 
+- name: Figure out current container's network IP
+  include_role:
+    name: setup_docker_current_container_network_ip
+
 - name: Create random name prefix and test registry name
   set_fact:
     docker_registry_container_name_registry: '{{ ''ansible-docker-test-registry-%0x'' % ((2**32) | random) }}'
@@ -36,10 +40,10 @@
 - debug:
     msg: Using test registry name {{ docker_registry_container_name_registry }} and nginx frontend names {{ docker_registry_container_name_nginx }} and {{ docker_registry_container_name_nginx2 }}
 
-- fail: msg="Too old docker / docker-py version to set up docker registry!"
-  when: not(docker_py_version is version('1.8.0', '>=') and docker_api_version is version('1.25', '>=')) and (ansible_distribution != 'CentOS' or ansible_distribution_major_version|int > 6)
+- fail: msg="Too old docker version to set up docker registry!"
+  when: not(docker_api_version is version('1.25', '>=')) and (ansible_distribution != 'CentOS' or ansible_distribution_major_version|int > 6)
 
-- when: docker_py_version is version('1.8.0', '>=') and docker_api_version is version('1.25', '>=')
+- when: docker_api_version is version('1.25', '>=')
   block:
 
   # Set up registry container