Add printing timestamp to wait condition for elasticsearch nodes

buildSrc/src/main/groovy/org/elasticsearch/gradle/test/ClusterConfiguration.groovy

@@ -23,6 +23,8 @@ import org.gradle.api.Project
 import org.gradle.api.file.FileCollection
 import org.gradle.api.tasks.Input
 
+import java.time.LocalDateTime
+
 /** Configuration for an elasticsearch cluster, used for integration tests. */
 class ClusterConfiguration {
 
@@ -55,6 +57,7 @@ class ClusterConfiguration {
     @Input
     Closure waitCondition = { NodeInfo node, AntBuilder ant ->
         File tmpFile = new File(node.cwd, 'wait.success')
+        ant.echo(message: "[${LocalDateTime.now()}] Waiting for elasticsearch node", level: "info")
         ant.get(src: "http://${node.httpUri()}",
                 dest: tmpFile.toString(),
                 ignoreerrors: true, // do not fail on error, so logging buffers can be flushed by the wait task