Set server selection timeout for the test suite.
Set server selection timeout for the test suite.

Without this the suite hangs for a long time trying to select a server
when talking to e.g. a misconfigured replica set.

mongodb/mongo-ruby-driver,saghm/mongo-ruby-driver,jonhyman/mongo-ruby-driver,mongodb/mongo-ruby-driver,mongodb/mongo-ruby-driver,saghm/mongo-ruby-driver,jonhyman/mongo-ruby-driver