Fix the issue raised on the mailing lists about the 0.9.7 removing the ability for auto named queues
Fix the issue raised on the mailing lists about the 0.9.7 removing the ability for auto named queues

Allow for default assignment of an empty string for a queue name.

benjamin9999/pika,vitaly-krugl/pika,vrtsystems/pika,knowsis/pika,pika/pika,shinji-s/pika,skftn/pika,zixiliuyue/pika,jstnlef/pika,renshawbay/pika-python3,fkarb/pika-python3,hugoxia/pika,reddec/pika,Zephor5/pika,Tarsbot/pika