Update celery tasks for generic migrate, add auto retry
Update celery tasks for generic migrate, add auto retry

felliott/scrapi,erinspace/scrapi,jeffreyliu3230/scrapi,mehanig/scrapi,CenterForOpenScience/scrapi,fabianvf/scrapi,icereval/scrapi,mehanig/scrapi,erinspace/scrapi,ostwald/scrapi,alexgarciac/scrapi,CenterForOpenScience/scrapi,felliott/scrapi,fabianvf/scrapi