Increase ansible-lint speed (#4632)

.gitlab-ci/lint.yml

@@ -11,7 +11,7 @@ ansible-lint:
   stage: unit-tests
   # lint every yml/yaml file that looks like it contains Ansible plays
   script: |-
-    grep -Rl '^- hosts: \|^  hosts: \|^- name: ' --include \*.yml --include \*.yaml . | xargs ansible-lint -v
+    grep -Rl '^- hosts: \|^  hosts: \|^- name: ' --include \*.yml --include \*.yaml . | xargs -P 4 -n 25 ansible-lint -v
   except: ['triggers', 'master']
 
 syntax-check: