Change required to use findbugs annotation

Add findbugs to dependency to use annotation like:
 @SuppressFBWarnings("EI_EXPOSE_REP")

Change-Id: I08190d727c3d1281051a87ae8a2361f284a32802
diff --git a/pom.xml b/pom.xml
index 0c3286c..8071217 100644
--- a/pom.xml
+++ b/pom.xml
@@ -682,6 +682,11 @@
       <artifactId>curator-x-discovery</artifactId>
       <version>2.4.1</version>
     </dependency>
+    <dependency>
+      <groupId>org.codehaus.mojo</groupId>
+      <artifactId>findbugs-maven-plugin</artifactId>
+      <version>${findbugs-plugin.version}</version>
+    </dependency>
   </dependencies>
   <profiles>
     <!-- Jenkins by default defines a property BUILD_NUMBER which is used to