[11.x] Fix: Apply database connection before checking if the repository exist

[sjspereira]

• Issue

There is an issue when running the command "php artisan migrate:fresh --database=someconnection".

When the command is ran providing the connection the tables are never being dropped.

So investigating the issue, we notice that the given connection isn't considered in the $this->migrator->repositoryExists() method.

To fix it was added the setConnection method as below:

if(! is_null($database)) {
    $this->migrator->setConnection($database);
}

OBS: The issue occurs when you specify a connection different than the default.

Thanks for @GabsCoding, that discovered this issue with me.

[driesvints]

We had to do a small fix here for resetting the connection: #51167