RUBY-1006 use __method__ for consistency
RUBY-1006 use __method__ for consistency

mongodb/mongo-ruby-driver,mongodb/mongo-ruby-driver,aherlihy/mongo-ruby-driver,kay-kim/mongo-ruby-driver,wandenberg/mongo-ruby-driver,saghm/mongo-ruby-driver,jonhyman/mongo-ruby-driver,mongodb/mongo-ruby-driver,fairplace/mongo-ruby-driver,jonhyman/mongo-ruby-driver,estolfo/mongo-ruby-driver,brandonblack/mongo-ruby-driver,fhwang/mongo-ruby-driver,kay-kim/mongo-ruby-driver,namusyaka/mongo-ruby-driver,saghm/mongo-ruby-driver,estolfo/mongo-ruby-driver