Allow to run post processing job for ManagerRefresh (Graph Refresh)

Allow to run post processing job for ManagerRefresh (Graph Refresh).
This post processing can leverage existing data in the
InventoryCollection and especially each collection's created_records,
updated_records and deleted_records, to queue up specific post
processing jobs.

app/models/ems_refresh/refreshers/ems_refresher_mixin.rb

@@ -69,10 +69,11 @@ def preprocess_targets
       end
 
       def refresh_targets_for_ems(ems, targets)
-        # handle a 3-part inventory refresh process
+        # handle a 4-part inventory refresh process
         # 1. collect inventory
         # 2. parse inventory
         # 3. save inventory
+        # 4. post process inventory (only when using InventoryCollections)
         log_header = format_ems_for_logging(ems)
 
         targets_with_inventory, _ = Benchmark.realtime_block(:collect_inventory_for_targets) do
@@ -90,9 +91,20 @@ def refresh_targets_for_ems(ems, targets)
 
           Benchmark.realtime_block(:save_inventory) { save_inventory(ems, target, hashes) }
           _log.info "#{log_header} Refreshing target #{target.class} [#{target.name}] id [#{target.id}]...Complete"
+
+          if hashes.kind_of?(Array)
+            _log.info "#{log_header} ManagerRefresh Post Processing #{target.class} [#{target.name}] id [#{target.id}]..."
+            # We have array of InventoryCollection, we want to use that data for post refresh
+            Benchmark.realtime_block(:manager_refresh_post_processing) { manager_refresh_post_processing(ems, target, hashes) }
+            _log.info "#{log_header} ManagerRefresh Post Processing #{target.class} [#{target.name}] id [#{target.id}]...Complete"
+          end
         end
       end
 
+      def manager_refresh_post_processing(_ems, _target, _inventory_collections)
+        # Implement post refresh actions in a specific refresher
+      end
+
       def collect_inventory_for_targets(ems, targets)
         # TODO: implement this method in all refreshers and remove from here
         # legacy refreshers collect inventory during the parse phase so the