Enable exception mode for PDO Saver

[glensc]

Fixes problem that PDO errors are not caught: #322

[athoune]

/run/import works well, but /run/view?id=5f5fcc1b2c5ff69b332f9a98 crash :

Type: ErrorException
Code: 2
Message: Invalid argument supplied for foreach()
File: /var/www/src/Xhgui/Profile.php
Line: 365
Trace

#0 /var/www/src/Xhgui/Profile.php(365): Slim\Slim::handleErrors(2, 'Invalid argumen...', '/var/www/src/Xh...', 365, Array)
#1 /var/www/src/Xhgui/Controller/Run.php(97): Xhgui_Profile->calculateSelf()
#2 /var/www/src/routes.php(30): Xhgui_Controller_Run->view()
#3 [internal function]: {closure}()
#4 /var/www/vendor/slim/slim/Slim/Route.php(468): call_user_func_array(Object(Closure), Array)
#5 /var/www/vendor/slim/slim/Slim/Slim.php(1355): Slim\Route->dispatch()
#6 /var/www/vendor/slim/slim/Slim/Middleware/Flash.php(85): Slim\Slim->call()
#7 /var/www/vendor/slim/slim/Slim/Middleware/MethodOverride.php(92): Slim\Middleware\Flash->call()
#8 /var/www/vendor/slim/slim/Slim/Middleware/SessionCookie.php(110): Slim\Middleware\MethodOverride->call()
#9 /var/www/src/Xhgui/Middleware/Render.php(11): Slim\Middleware\SessionCookie->call()
#10 /var/www/vendor/slim/slim/Slim/Middleware/PrettyExceptions.php(67): Xhgui_Middleware_Render->call()
#11 /var/www/vendor/slim/slim/Slim/Slim.php(1300): Slim\Middleware\PrettyExceptions->call()
#12 /var/www/webroot/index.php(10): Slim\Slim->run()
#13 {main}