MINOR: Revert to ZooKeeper 3.4.10 due to ZOOKEEPER-2960 (#4678)

It's a critical bug that only affects the server, but we
don't have an easy way to use 3.4.11 for the client
only.

Reviewers: Jun Rao <junrao@gmail.com>, Damian Guy <damian.guy@gmail.com>

core/src/test/scala/unit/kafka/server/ServerShutdownTest.scala

@@ -23,6 +23,7 @@ import kafka.utils.TestUtils._
 import kafka.api.FetchRequestBuilder
 import kafka.message.ByteBufferMessageSet
 import java.io.File
+import java.net.UnknownHostException
 
 import kafka.log.LogManager
 import org.apache.kafka.clients.producer.{KafkaProducer, ProducerRecord}
@@ -130,7 +131,7 @@ class ServerShutdownTest extends ZooKeeperTestHarness {
     val newProps = TestUtils.createBrokerConfig(0, zkConnect)
     newProps.setProperty("zookeeper.connect", "some.invalid.hostname.foo.bar.local:65535")
     val newConfig = KafkaConfig.fromProps(newProps)
-    verifyCleanShutdownAfterFailedStartup[IllegalArgumentException](newConfig)
+    verifyCleanShutdownAfterFailedStartup[UnknownHostException](newConfig)
   }
 
   @Test

core/src/test/scala/unit/kafka/zookeeper/ZooKeeperClientTest.scala

@@ -16,6 +16,7 @@
  */
 package kafka.zookeeper
 
+import java.net.UnknownHostException
 import java.nio.charset.StandardCharsets
 import java.util.UUID
 import java.util.concurrent.atomic.AtomicBoolean
@@ -57,7 +58,7 @@ class ZooKeeperClientTest extends ZooKeeperTestHarness {
     System.clearProperty(JaasUtils.JAVA_LOGIN_CONFIG_PARAM)
   }
 
-  @Test(expected = classOf[IllegalArgumentException])
+  @Test(expected = classOf[UnknownHostException])
   def testUnresolvableConnectString(): Unit = {
     new ZooKeeperClient("some.invalid.hostname.foo.bar.local", -1, -1, Int.MaxValue, time, "testMetricGroup",
       "testMetricType").close()

gradle/dependencies.gradle

@@ -71,7 +71,7 @@ versions += [
   slf4j: "1.7.25",
   snappy: "1.1.7.1",
   zkclient: "0.10",
-  zookeeper: "3.4.11",
+  zookeeper: "3.4.10",
   jfreechart: "1.0.0",
   mavenArtifact: "3.5.2"
 ]