Reduce comment to what's necessary

Some tests were complaining about calling in comments.

e.g.:

error: Comments can only be scalar objects, not "call" in "$(cfe_internal_hub_vars.docroot)/application/cache/."

It's strange, we use concat in many places to avoid a multi-line string with many
spaces for readability in policy that results in bad actual comment string. It's
unclear why some but not all platforms failed with this.

cfe_internal/enterprise/CFE_knowledge.cf

@@ -201,9 +201,7 @@ bundle agent cfe_internal_setup_knowledge
         handle => "cfe_internal_setup_knowledge_files_doc_root_application_cache",
         create => "true",
         perms => mog("0770", $(def.cf_apache_user), $(def.cf_apache_group)),
-        comment => concat( "Ensure permissions for ",
-                           " $(cfe_internal_hub_vars.docroot)/application/cache/.",
-                           " This is where cache generated by Mission Portal stores" );
+        comment => "This is where cache generated by Mission Portal is stored.";
 
       "$(cfe_internal_hub_vars.docroot)/api/." -> { "ENT-4250" }
         comment => "The api directory and it's subdirectories need to be