Add nexus staging maven plugin

Change-Id: I520a8fafd56709722c776f3fc0d2d23dbdb8e859
diff --git a/pom.xml b/pom.xml
index 0ec1c47..6c491f7 100644
--- a/pom.xml
+++ b/pom.xml
@@ -330,6 +330,17 @@
                     </execution>
                 </executions>
             </plugin>
+            <plugin>
+                <groupId>org.sonatype.plugins</groupId>
+                <artifactId>nexus-staging-maven-plugin</artifactId>
+                <version>1.6.7</version>
+                <extensions>true</extensions>
+                <configuration>
+                    <serverId>korap</serverId>
+                    <nexusUrl>https://s01.oss.sonatype.org/</nexusUrl>
+                    <autoReleaseAfterClose>false</autoReleaseAfterClose>
+                </configuration>
+            </plugin>
         </plugins>
     </build>