Fixed duplicate bundlesequence_end when bundlesequence_classification not defined

Ticket: CFE-4588
Changelog: Title
(cherry picked from commit ff02373)

Author: nickanderson

controls/def.cf

@@ -276,15 +276,33 @@ bundle common def
         if => not( isvariable( "control_agent_maxconnections" ) );
 
       # Because in some versions of cfengine bundlesequence in body common
-      # control does not support does not support iteration over data containers
-      # we must first pick out the bundles into a shallow container that we can
-      # then get a regular list from using getvalues().
+      # control does not support iteration over data containers we must first
+      # pick out the bundles into a shallow container that we can then get a
+      # regular list from using getvalues().
 
-      "tbse" data => mergedata( "def.control_common_bundlesequence_end" );
-      "bundlesequence_end" slist => getvalues( tbse );
-
-      "tbse" data => mergedata( "def.control_common_bundlesequence_classification" );
-      "bundlesequence_classification" slist => getvalues( tbse );
+      "bundlesequence_end" -> { "CFE-4855" }
+        slist => { },
+        if => not( isvariable( "def.control_common_bundlesequence_end") ),
+        comment => concat( "We define an empty list so that the agent will not",
+                           " error about undefined variable when ",
+                           " def.bundlesequence_end is not defined." );
+      "bundlesequence_end" -> { "CFE-4855" }
+        slist => getvalues( mergedata( "def.control_common_bundlesequence_end" ) ),
+        comment => concat( "We define bundlesequence_end from Augments if it's",
+                           "  available. This allows for customization without",
+                           " modifying the vendored policy." );
+
+      "bundlesequence_classification" -> { "CFE-4855" }
+        slist => { },
+        if => not( isvariable( "def.control_common_bundlesequence_classification") ),
+        comment => concat( "We define an empty list so that the agent will not",
+                           " error about undefined variable when ",
+                           " def.bundlesequence_classification is not defined." );
+      "bundlesequence_classification" -> { "CFE-4855" }
+        slist => getvalues( mergedata( "def.control_common_bundlesequence_classification" ) ),
+        comment => concat( "We define bundlesequence_classification from Augments if it's",
+                           " available. This allows for customization without",
+                           " modifying the vendored policy." );
 
       "control_common_ignore_missing_bundles" -> { "CFE-2773" }
         string => ifelse( strcmp( $(control_common_ignore_missing_bundles), "true" ),