1.5.6

bugfix #28957 - fix amount order
bugfix #29002 - enable feature with '0' value
feature #29001 - add more log for update order
bugfix #28982 - fix breadcrumb for product feed
feature #28961 - send log to sf when customer create fail
feature #28960 - add attachment to product feed
bugfix #28955 - fix rule for 'Mondial Relay'
bugfix #28880 - prevent change state order when state is "PS_OS_PAYMENT"