backups

Cleaned up the backup scripts on saiwaves and krishna, made them functional.

1. Corrected db pw on the script on krishna's cron
2. Corrected IP address on the script on saiwaves's cron
3. Added scp with -r option to copy over the krishna backups to saiwaves.

Krishna takes around 5 minutes to do the backup with gz option. Saiwaves takes around 20 seconds to do its backup. File copying takes around the same times. SI db backup file after gz is around 1 GB. Uncompressed sgh db is around 200 MB.