Prefix the db dump

[marcelovani]

Background
When the command to import the database is executed, it will copy the file from the remote location to /tmp folder. Next time you run the command, it will check if the dump has been modified to avoid copying the file again, this saves time.

The problem
If the dump has the same name for all the sites, i.e. latest.sql.gz, and you download the dump for two different sites, the functionality above will not work, because the files will be different

Proposed solution
Prefix the dump or put the dump into a subfolder, so that when the copy happens, it doesn't replace the existing dump for another site.
Also, Devops suggested not using /tmp to store the dumps, but the home folder i.e. ~/tmp