Fix ansible-lint empty-string-compare violations

tasks/main.yml

@@ -39,7 +39,7 @@
 - name: Define the Gitlab package name.
   set_fact:
     gitlab_package_name: "{{ gitlab_edition }}{{ gitlab_package_version_separator }}{{ gitlab_version }}"
-  when: gitlab_version != ''
+  when: gitlab_version|length > 0
 
 - name: Install GitLab
   package: