Merge mongodb#769

Merge pull request mongodb#769 from giolvani/patch-1

update MongoQueue.php

Fix access level of addColumn

Merge pull request mongodb#753 from rjvandoesburg/master

Pass credentials as parameters

Update readme mongodb#744, fixes #mongodb#746

Fixes mongodb#736

Fix auth for L5.2

Forgot to disable transaction

Add grammar to 2.2 as well, fixes mongodb#729

Merge pull request mongodb#727 from jenssegers/analysis-XpeOKL

Applied fixes from StyleCI