[service bus] Migration guide changes for errors, api changes, etc...#17656

Merged

3 commits merged intoAzure:masterfrom richardpark-msft:sb-migrationguide

Nov 18, 2020

+34-34

Commits on Nov 18, 2020

Updating migration guide to incorporate changes made in the API along with a few small errors and consistency changes
richardpark-msft
committed
Remove manual message compleition - the processor autocompletes by default and we haven't shut it off.
richardpark-msft
committed
Missing semi-colons.
richardpark-msft
committed