Update Socket::SSL test to account for changes in SSLSocket errors in MRI 2.4
Update Socket::SSL test to account for changes in SSLSocket errors in MRI 2.4

kay-kim/mongo-ruby-driver,saghm/mongo-ruby-driver,mongodb/mongo-ruby-driver,mongodb/mongo-ruby-driver,jonhyman/mongo-ruby-driver,kay-kim/mongo-ruby-driver,mongodb/mongo-ruby-driver,saghm/mongo-ruby-driver,estolfo/mongo-ruby-driver,estolfo/mongo-ruby-driver,jonhyman/mongo-ruby-driver