Restore FlexMaster to default (clear all)

1. copy the restore_db.sh to FlexMaster path
cp /opt/FlexMaster/Support-files/restore_db.sh /opt/FlexMaster/.
2. run the restore_db.sh script
sh ./opt/FlexMaster/restore_db.sh
3. shutdown FlexMaster
sh ./shutdown.sh
4. start the FlexMaster
sh ./start.sh