Fix logging Warning date_default_timezone_get()

[diego-garber]

[Tue Mar 25 10:51:13 2014] [error] [client 201.216.209.201] PHP Warning: date_default_timezone_get() [function.date-default-timezon
e-get]: It is not safe to rely on the system's timezone settings. You are required to use the date.timezone setting or the date_default_timezone_set() function. In case yo
u used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected 'America/New_York' for 'EDT/-4.0/DST' instead
in /home/httpd/sites/octopush.olx.com.ar/vendor/monolog/monolog/src/Monolog/Logger.php on line 209