Add equals and hashcode test.

Author: vbabanin

driver-core/src/test/unit/com/mongodb/ConnectionStringUnitTest.java

@@ -69,7 +69,10 @@ private static String encode(final String string) {
     }
 
     @ParameterizedTest
-    @ValueSource(strings = {DEFAULT_OPTIONS + "serverMonitoringMode=stream"})
+    @ValueSource(strings = {
+            DEFAULT_OPTIONS + "serverMonitoringMode=stream",
+            DEFAULT_OPTIONS + "enableOverloadRetargeting=true"
+    })
     void equalAndHashCode(final String connectionString) {
         ConnectionString default1 = new ConnectionString(DEFAULT_OPTIONS);
         ConnectionString default2 = new ConnectionString(DEFAULT_OPTIONS);