delete customers from sw5.1.0 instance

delete_customers_sw510.txt

1. truncate 
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SET foreign_key_checks = 0;
TRUNCATE `s_user`;
TRUNCATE `s_user_attributes`;
TRUNCATE `s_user_billingaddress`;
TRUNCATE `s_user_billingaddress_attributes`;
TRUNCATE `s_user_debit`;
TRUNCATE `s_user_shippingaddress`;
TRUNCATE `s_user_shippingaddress_attributes`;
SET foreign_key_checks = 1;