Fix failures of ansible-lint (#8401)

This fixes the following types of failures:
- empty-string-compare
- literal-compare
- risky-file-permissions
- risky-shell-pipe
- var-spacing

In addition, this changes .gitlab-ci/lint.yml to block the same issue
by using the same method at Kubespray CI.

.gitlab-ci/lint.yml

@@ -23,9 +23,8 @@ ansible-lint:
   extends: .job
   stage: unit-tests
   tags: [light]
-  # lint every yml/yaml file that looks like it contains Ansible plays
-  script: |-
-    grep -Rl '^- hosts: \|^  hosts: ' --include \*.yml --include \*.yaml . | xargs -P 4 -n 25 ansible-lint -v
+  script:
+    - ansible-lint -v
   except: ['triggers', 'master']
 
 syntax-check: