Add attributes to apache2, cobbler, dimensiondata, icinga2, lxca, pritunl, and spectrum modules (#5963)

Add attributes to apache2, cobbler, dimensiondata, icinga2, lxca, pritunl, and spectrum modules.

plugins/modules/icinga2_feature.py

@@ -21,6 +21,13 @@ short_description: Manage Icinga2 feature
 description:
     - This module can be used to enable or disable an Icinga2 feature.
 author: "Loic Blot (@nerzhul)"
+extends_documentation_fragment:
+    - community.general.attributes
+attributes:
+    check_mode:
+        support: full
+    diff_mode:
+        support: none
 options:
     name:
       type: str