KAFKA-8892: Display the sorted configs in Kafka Configs Help Command.

Author: Kamal Chandraprakash <kamal.chandraprakash@gmail.com>

Reviewers: Reviewers: Manikumar Reddy <manikumar.reddy@gmail.com>

Closes #7319 from kamalcph/KAFKA-8892

core/src/main/scala/kafka/admin/ConfigCommand.scala

@@ -128,7 +128,7 @@ object ConfigCommand extends Config {
       if (dynamicBrokerConfigs.nonEmpty) {
         val perBrokerConfig = entityName != ConfigEntityName.Default
         val errorMessage = s"--bootstrap-server option must be specified to update broker configs $dynamicBrokerConfigs."
-        val info = "Broker configuraton updates using ZooKeeper are supported for bootstrapping before brokers" +
+        val info = "Broker configuration updates using ZooKeeper are supported for bootstrapping before brokers" +
           " are started to enable encrypted password configs to be stored in ZooKeeper."
         if (perBrokerConfig) {
           adminZkClient.parseBroker(entityName).foreach { brokerId =>
@@ -522,9 +522,9 @@ object ConfigCommand extends Config {
     val nl = System.getProperty("line.separator")
     val addConfig = parser.accepts("add-config", "Key Value pairs of configs to add. Square brackets can be used to group values which contain commas: 'k1=v1,k2=[v1,v2,v2],k3=v3'. The following is a list of valid configurations: " +
             "For entity-type '" + ConfigType.Topic + "': " + LogConfig.configNames.map("\t" + _).mkString(nl, nl, nl) +
-            "For entity-type '" + ConfigType.Broker + "': " + DynamicConfig.Broker.names.asScala.map("\t" + _).mkString(nl, nl, nl) +
-            "For entity-type '" + ConfigType.User + "': " + DynamicConfig.User.names.asScala.map("\t" + _).mkString(nl, nl, nl) +
-            "For entity-type '" + ConfigType.Client + "': " + DynamicConfig.Client.names.asScala.map("\t" + _).mkString(nl, nl, nl) +
+            "For entity-type '" + ConfigType.Broker + "': " + DynamicConfig.Broker.names.asScala.toSeq.sorted.map("\t" + _).mkString(nl, nl, nl) +
+            "For entity-type '" + ConfigType.User + "': " + DynamicConfig.User.names.asScala.toSeq.sorted.map("\t" + _).mkString(nl, nl, nl) +
+            "For entity-type '" + ConfigType.Client + "': " + DynamicConfig.Client.names.asScala.toSeq.sorted.map("\t" + _).mkString(nl, nl, nl) +
             s"Entity types '${ConfigType.User}' and '${ConfigType.Client}' may be specified together to update config for clients of a specific user.")
             .withRequiredArg
             .ofType(classOf[String])