[FLINK-5987] [build] Upgrade zookeeper dependency to 3.4.10

This closes #4319.

pom.xml

@@ -107,7 +107,7 @@ under the License.
 		<scala.binary.version>2.11</scala.binary.version>
 		<chill.version>0.7.4</chill.version>
 		<asm.version>5.0.4</asm.version>
-		<zookeeper.version>3.4.6</zookeeper.version>
+		<zookeeper.version>3.4.10</zookeeper.version>
 		<curator.version>2.12.0</curator.version>
 		<jackson.version>2.7.4</jackson.version>
 		<metrics.version>3.1.5</metrics.version>