Issue #2125407 by moshe weitzman: Don't redirect CLI requests to install.php.

core/includes/bootstrap.inc

@@ -1976,7 +1976,7 @@ function _drupal_bootstrap_configuration() {
   // Redirect the user to the installation script if Drupal has not been
   // installed yet (i.e., if no $databases array has been defined in the
   // settings.php file) and we are not already installing.
-  if (empty($GLOBALS['databases']) && !drupal_installation_attempted()) {
+  if (empty($GLOBALS['databases']) && !drupal_installation_attempted() && !drupal_is_cli()) {
     include_once __DIR__ . '/install.inc';
     install_goto('core/install.php');
   }