Do not define a value for APP_HOSTNAME
Do not define a value for APP_HOSTNAME

Signed-off-by: Adam King <a74e182e49abf6252c9b13e1b94c4c5a47f8da9a@us.ibm.com>

jcantosz/bluemix-php-sample-1486741919310,jcantosz/bluemix-php-sample-1486741919310