Merge branch 'feature-2.4/RM-3285' into 'release/V2.4'

Feature 2.4/rm 3285

Added check not to be able to put null in cache, for nodes that are not records and don't have a filePlan.
Added unit test for it.

See merge request !128

rm-community/rm-community-repo/source/java/org/alfresco/module/org_alfresco_module_rm/util/ServiceBaseImpl.java

@@ -430,8 +430,11 @@ public class ServiceBaseImpl implements RecordsManagementModel, ApplicationConte
                     }
                 }
 
-                // cache result in transaction
-                transactionCache.put(nodeRef, result);
+                // cache result in transaction if result is not null
+                if (result != null)
+                {
+                    transactionCache.put(nodeRef, result);
+                }
             }
         }