Bump org.apache.zookeeper:zookeeper in /integration-tests

Bumps org.apache.zookeeper:zookeeper from 3.5.6 to 3.7.2.

---
updated-dependencies:
- dependency-name: org.apache.zookeeper:zookeeper
  dependency-type: direct:development
...

Signed-off-by: dependabot[bot] <support@github.com>

integration-tests/pom.xml

@@ -81,7 +81,7 @@
         <dependency>
             <groupId>org.apache.zookeeper</groupId>
             <artifactId>zookeeper</artifactId>
-            <version>3.5.6</version>
+            <version>3.7.2</version>
             <scope>test</scope>
         </dependency>