Define cell_align_left for tests

It's defined early in common.inc.php so it's always available.

Signed-off-by: Michal Čihař <michal@cihar.com>

test/bootstrap-dist.php

@@ -81,6 +81,7 @@ $_SESSION[' PMA_token '] = 'token';
 $_SESSION['tmpval']['pftext'] = 'F';
 $GLOBALS['lang'] = 'en';
 $GLOBALS['is_ajax_request'] = false;
+$GLOBALS['cell_align_left'] = 'left';
 
 // Check whether we have runkit extension
 define('PMA_HAS_RUNKIT', function_exists('runkit_constant_redefine'));