fix template

playbooks/roles/jenkins_common/templates/config/mask_passwords_config.yml.j2

 ---
 MASKED_PARAMETER_CLASSES:
 {% for class in JENKINS_MASK_PASSWORDS_CLASSES %}
-  - {{ class }}
+  - '{{ class }}'
 {% endfor %}
 NAME_PASSWORD_PAIRS:
 {% for pair in JENKINS_MASK_PASSWORDS_PAIRS %}
-  - NAME: {{ pair.NAME }}
-    PASSWORD: {{ pair.PASSWORD }}
+  - NAME: '{{ pair.NAME }}'
+    PASSWORD: '{{ pair.PASSWORD }}'
 {% endfor %}