Repair broken database sanitisation task

[fubarhouse]

The tfa_basic module recently introduced prevents any database sanitation tasks from completing successfully. I've upstreamed a new patch to the issue on drupal.org as the existing patch is not compatible.

The tfa_basic module will explicitly attempt to truncate a set of tables regardless of the install state of the tfa_basic module, as well as not checking if the tables exist before doing so.

The patch will check each table exists before performing the same action.

I will be shortly providing output proving the differences in terminal output between the vanilla project which fails, and the applied patch.