Fixes for metadata listing and _ensure_connection
Fixes for metadata listing and _ensure_connection

Johnetordoff/waterbutler,rafaeldelucena/waterbutler,icereval/waterbutler,felliott/waterbutler,Ghalko/waterbutler,cosenal/waterbutler,hmoco/waterbutler,CenterForOpenScience/waterbutler,chrisseto/waterbutler,rdhyee/waterbutler,kwierman/waterbutler,RCOSDP/waterbutler,TomBaxter/waterbutler