ansible: replace deprecated include by import_tasks

include_tasks and import_tasks have similar functionality.
Use import_tasks when importing non-variable depending files.
Further use import_tasks when not used within a loop.

Closes: OS#5797
Change-Id: I29766c65b9e1601a20aa8f20a438e8368c65f6a8

ansible/roles/docker/tasks/main.yml

@@ -57,4 +57,4 @@
   shell: "docker info | grep -q 'Storage Driver: overlay2' || rm -rf /var/lib/docker/vfs"
 
 # After docker is set up, add docuum to clean old docker images
-- include: docuum.yml
+- import_tasks: docuum.yml

ansible/roles/osmocom-workstation/tasks/main.yml

@@ -9,8 +9,8 @@
     shell: /usr/bin/zsh
     groups: docker
 
-- name: include git repos
-  include: git-repos.yml
+- name: import git repos
+  import_tasks: git-repos.yml
 
 - name: install distribution packages
   apt: