Reduce default keepalive time to align with Azure defaults

JAVA-3743

Author: jstewart148

driver-core/src/main/com/mongodb/internal/connection/SocketStreamHelper.java

@@ -37,7 +37,7 @@
 final class SocketStreamHelper {
     // Keep alive options and their values for Java 11+
     private static final String TCP_KEEPIDLE = "TCP_KEEPIDLE";
-    private static final int TCP_KEEPIDLE_DURATION = 300;
+    private static final int TCP_KEEPIDLE_DURATION = 120;
     private static final String TCP_KEEPCOUNT = "TCP_KEEPCOUNT";
     private static final int TCP_KEEPCOUNT_LIMIT = 9;
     private static final String TCP_KEEPINTERVAL = "TCP_KEEPINTERVAL";

driver-core/src/test/functional/com/mongodb/internal/connection/SocketStreamHelperSpecification.groovy

@@ -55,7 +55,7 @@ class SocketStreamHelperSpecification extends Specification {
         if (Arrays.stream(ExtendedSocketOptions.getDeclaredFields()).anyMatch{ f -> f.getName().equals('TCP_KEEPCOUNT') }) {
             Method getOptionMethod = Socket.getMethod('getOption', SocketOption);
             getOptionMethod.invoke(socket, ExtendedSocketOptions.getDeclaredField('TCP_KEEPCOUNT').get(null)) == 9
-            getOptionMethod.invoke(socket, ExtendedSocketOptions.getDeclaredField('TCP_KEEPIDLE').get(null)) == 300
+            getOptionMethod.invoke(socket, ExtendedSocketOptions.getDeclaredField('TCP_KEEPIDLE').get(null)) == 120
             getOptionMethod.invoke(socket, ExtendedSocketOptions.getDeclaredField('TCP_KEEPINTERVAL').get(null)) == 10
         }