Database update does not delete tables

[andrewtf]

When updating databases, tables are not deleted. This leads to errors when Drupal update expects a table not to exist.

https://github.com/eosrei/git-dev-workflow/blob/5857e7fbf29f1e9185b1b3bcc2047832c11893c8/playbook/files/usr-local-bin-gdw#L140

[davidneedham]

I've been seeing a lot of errors saying tables already exist. Could that be related?

[andrewtf]

Doing dev testing, updated dev from live and ran into an update script error when table was already present. Deleted dev db and updated again.