use chronounit, mirroring gradle smoke test configuration

Author: daniel-mohedano

dd-smoke-tests/maven/build.gradle

@@ -1,4 +1,5 @@
 import java.time.Duration
+import java.time.temporal.ChronoUnit
 
 plugins {
   id "com.gradleup.shadow"
@@ -25,7 +26,7 @@ tasks.withType(Test).configureEach {
 
   // overriding the default timeout set in configure_tests.gradle, as Maven smoke
   // tests might run for a longer duration
-  timeout = Duration.ofMinutes(20)
+  timeout = Duration.of(20, ChronoUnit.MINUTES)
 
   if (project.hasProperty("mavenRepositoryProxy")) {
     // propagate proxy URL to tests, to then propagate it to nested Gradle builds