RUBY-2771 unpend test (#5252)

Co-authored-by: Oleg Pudeyev <[email protected]>

Author: p-mongo

spec/mongoid/clients/factory_spec.rb

@@ -65,10 +65,8 @@
             expect(client).to be_a(Mongo::Client)
           end
 
-          context 'not JRuby' do
-            # Run this test on JRuby when driver 2.16.0 is released -
-            # see RUBY-2771.
-            fails_on_jruby
+          context 'on driver versions that do not report spurious EOF errors' do
+            min_driver_version '2.16'
 
             it 'does not produce driver warnings' do
               Mongo::Logger.logger.should_not receive(:warn)