YARN-6010. Fix findbugs, site warnings in yarn-services-api module. Contributed by Jian He

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-applications/hadoop-yarn-services-api/dev-support/findbugs-exclude.xml

@@ -16,5 +16,7 @@
    limitations under the License.
 -->
 <FindBugsFilter>
-
+    <Match>
+        <Package name="org.apache.hadoop.yarn.services.resource" />
+    </Match>
 </FindBugsFilter>

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-applications/hadoop-yarn-services-api/pom.xml

@@ -108,19 +108,6 @@
         </configuration>
       </plugin>
 
-      <plugin>
-        <groupId>org.apache.maven.plugins</groupId>
-        <artifactId>maven-site-plugin</artifactId>
-        <version>${maven-site-plugin.version}</version>
-
-        <dependencies>
-          <dependency>
-            <groupId>org.apache.maven.doxia</groupId>
-            <artifactId>doxia-module-markdown</artifactId>
-            <version>${maven-doxia-module-markdown.version}</version>
-          </dependency>
-        </dependencies>
-      </plugin>
     </plugins>
   </build>