[SpotBugs]Enable spotbugs for pulsar-zookeeper (apache#8800)

Fix: https://github.com/streamnative/pulsar/issues/1804

This PR enable spotbugs for moduel `pulsar-zookeeper`

pulsar-zookeeper/pom.xml

@@ -103,6 +103,23 @@
           </execution>
         </executions>
       </plugin>
+      <plugin>
+        <groupId>com.github.spotbugs</groupId>
+        <artifactId>spotbugs-maven-plugin</artifactId>
+        <version>${spotbugs-maven-plugin.version}</version>
+        <configuration>
+          <excludeFilterFile>${basedir}/src/main/resources/findbugsExclude.xml</excludeFilterFile>
+        </configuration>
+        <executions>
+          <execution>
+            <id>spotbugs</id>
+            <phase>verify</phase>
+            <goals>
+              <goal>check</goal>
+            </goals>
+          </execution>
+        </executions>
+      </plugin>
     </plugins>
     <pluginManagement>
       <plugins>

pulsar-zookeeper/src/main/resources/findbugsExclude.xml

@@ -0,0 +1,26 @@
+<!--
+
+    Licensed to the Apache Software Foundation (ASF) under one
+    or more contributor license agreements.  See the NOTICE file
+    distributed with this work for additional information
+    regarding copyright ownership.  The ASF licenses this file
+    to you under the Apache License, Version 2.0 (the
+    "License"); you may not use this file except in compliance
+    with the License.  You may obtain a copy of the License at
+
+      http://www.apache.org/licenses/LICENSE-2.0
+
+    Unless required by applicable law or agreed to in writing,
+    software distributed under the License is distributed on an
+    "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+    KIND, either express or implied.  See the License for the
+    specific language governing permissions and limitations
+    under the License.
+
+-->
+<FindBugsFilter>
+    <Match>
+        <Class name="~org.apache.zookeeper.*"/>
+        <Bug pattern="DM_EXIT,DM_DEFAULT_ENCODING"/>
+    </Match>
+</FindBugsFilter>