RUBY-1095 Don't test parallelScan on 2.4
RUBY-1095 Don't test parallelScan on 2.4

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