Change migrate2 api to accept to_db; toggle safemode; add table param change message.
Merge remote-tracking branch 'origin/zjw' into macan, desc progressing.
Merge remote-tracking branch 'origin/zjw' into macan, add missing files.
Add Index creation to migration target DC;
Change tbl properties, add new store.identify to source/target table;
Add msg notification for data migration;
Filter the NAS device for inactive device detection.
merge test