minor: tidy t/lib/MongoTest.pm
minor: tidy t/lib/MongoTest.pm

dagolden/mongo-perl-driver,xdg/mongo-perl-driver,mongodb/mongo-perl-driver,dagolden/mongo-perl-driver,dagolden/mongo-perl-driver,xdg/mongo-perl-driver,dagolden/mongo-perl-driver,mongodb/mongo-perl-driver,mongodb/mongo-perl-driver,xdg/mongo-perl-driver