Add image_label_mismatch parameter to docker_container (#370)

* Add image_label_mismatch to docker_container

* Apply suggestions from code review

Co-authored-by: Felix Fontein <felix@fontein.de>

* Test image_label_mismatch error message

* Add change fragment for image_label_mismatch

* Break long line in docker_container.py for pep-8 compliance

* pep8 compliance

* Update changelogs/fragments/370-add-image-label-mismatch.yml

Co-authored-by: Felix Fontein <felix@fontein.de>

* fix: add expected_labels to parameters_map in docker_container

* Apply suggestions from code review

* Apply suggestions from code review

* Update tests/integration/targets/docker_container/tasks/tests/options.yml

Co-authored-by: Felix Fontein <felix@fontein.de>

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

@@ -22,6 +22,7 @@
   set_fact:
     cname_prefix: "{{ 'ansible-docker-test-%0x' % ((2**32) | random) }}"
     cnames: []
+    inames: []
     dnetworks: []
 
 - debug:
@@ -41,6 +42,11 @@
       force_kill: yes
     with_items: "{{ cnames }}"
     diff: no
+  - name: "Make sure all images are removed"
+    docker_image:
+      name: "{{ item }}"
+      state: absent
+    with_items: "{{ inames }}"
   - name: "Make sure all networks are removed"
     docker_network:
       name: "{{ item }}"