Improve logging for template store cleanup by adding debug information for pre-download states

Author: Damans227

engine/storage/image/src/main/java/org/apache/cloudstack/storage/image/TemplateServiceImpl.java

@@ -571,10 +571,13 @@ public void handleTemplateSync(DataStore store) {
                                         && tmpltStore.getState() == State.Ready
                                         && tmpltStore.getInstallPath() == null) {
                                     logger.info("Keep fake entry in template store table for migration of previous NFS to object store");
-                                } else {
+                                } else if (tmpltStore.getDownloadState() == VMTemplateStorageResourceAssoc.Status.DOWNLOADED
+                                        || tmpltStore.getState() == State.Ready) {
                                     logger.info("Removing leftover template {} entry from template store table", tmplt);
-                                    // remove those leftover entries
                                     _vmTemplateStoreDao.remove(tmpltStore.getId());
+                                } else {
+                                    logger.debug("Template {} entry on store {} is in pre-download state ({}/{}); not treating as leftover.",
+                                            tmplt, store, tmpltStore.getState(), tmpltStore.getDownloadState());
                                 }
                             }
                         }