install_run_tasks(&$install_state)
Runs all tasks for the current installation request.
In the case of an interactive installation, all tasks will be attempted until one is reached that has output which needs to be displayed to the user, or until a page redirect is required. Otherwise, tasks will be attempted until the installation is finished.
Parameters
$install_state: An array of information about the current installation state. This is passed along to each task, so it can be modified i