Reduces number of threads used for testing
Reduces number of threads used for testing

This reduces memory usage that can cause problems testing a heavily
loaded or low-RAM system.

mongodb/mongo-perl-driver,rahuldhodapkar/mongo-perl-driver,gormanb/mongo-perl-driver,xdg/mongo-perl-driver,mongodb/mongo-perl-driver,xdg/mongo-perl-driver,dagolden/mongo-perl-driver,gormanb/mongo-perl-driver,jorol/mongo-perl-driver,jorol/mongo-perl-driver,dagolden/mongo-perl-driver,jorol/mongo-perl-driver,gormanb/mongo-perl-driver,xdg/mongo-perl-driver,rahuldhodapkar/mongo-perl-driver,dagolden/mongo-perl-driver,jorol/mongo-perl-driver,gormanb/mongo-perl-driver,mongodb/mongo-perl-driver,rahuldhodapkar/mongo-perl-driver,rahuldhodapkar/mongo-perl-driver,dagolden/mongo-perl-driver