feat: idsse-897: minor Publisher refactor (#88)

* add protections for Publisher/Consumer using default exch or queue
* setting prefetch_count must be done before calling basic_consume
* re-order rabbitmq_utils classes and functions
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Co-authored-by: Geary Layne <77741618+Geary-Layne@users.noreply.github.com>

Author: mackenzie-grimes-noaa