fix new bug in parsing amqp:// address where the default vhost was incorrectly overwritten
fix new bug in parsing amqp:// address where the default vhost was incorrectly overwritten

CopernicaMarketingSoftware/AMQP-CPP,toolking/AMQP-CPP,CopernicaMarketingSoftware/AMQP-CPP,toolking/AMQP-CPP