MONGOID-5412 Fix JRuby 9.2/9.3 tests (#5350)

* MONGOID-5270 use eq instead of be

* add retry test to flaky mongoid test

Author: neilshweky

spec/mongoid/clients/options_spec.rb

@@ -413,6 +413,7 @@
         end
 
         context 'when the options create a new cluster' do
+          retry_test
           # This test fails on sharded topologies in Evergreen but not locally
           require_topology :single, :replica_set
 

spec/mongoid/config_spec.rb

@@ -204,7 +204,7 @@
 
         Mongoid.configure { |config| config.load_configuration(configuration) }
 
-        expect(Mongoid::Config.discriminator_key).to be("_type")
+        expect(Mongoid::Config.discriminator_key).to eq("_type")
       end
     end
 
@@ -215,11 +215,11 @@
 
         Mongoid.configure { |config| config.load_configuration(configuration) }
 
-        expect(Mongoid::Config.discriminator_key).to be("test")
+        expect(Mongoid::Config.discriminator_key).to eq("test")
       end
 
       it 'is set globally' do
-        expect(Mongoid.discriminator_key).to be("test")
+        expect(Mongoid.discriminator_key).to eq("test")
       end
     end
   end
@@ -260,7 +260,7 @@
       let(:conf) { CONFIG }
 
       it "it is set to its default" do
-        expect(Mongoid.send(option)).to be(default)
+        expect(Mongoid.send(option)).to eq(default)
       end
     end
   end