HDDS-5006. Use Log4j to print error messages for Datanode startup (#2066)

diff --git a/hadoop-hdds/container-service/src/main/java/org/apache/hadoop/ozone/HddsDatanodeService.java b/hadoop-hdds/container-service/src/main/java/org/apache/hadoop/ozone/HddsDatanodeService.java
index 25c4af7..cb34e66 100644
--- a/hadoop-hdds/container-service/src/main/java/org/apache/hadoop/ozone/HddsDatanodeService.java
+++ b/hadoop-hdds/container-service/src/main/java/org/apache/hadoop/ozone/HddsDatanodeService.java
@@ -587,4 +587,9 @@
   public void setCertificateClient(CertificateClient client) {
     dnCertClient = client;
   }
+
+  @Override
+  public void printError(Throwable error) {
+    LOG.error("Exception in HddsDatanodeService.", error);
+  }
 }