Remove sources and javadoc plugin. This is already handled by the release plugin

            </properties>

            <build>

                <plugins>

                     <plugin>

                        <groupId>org.apache.maven.plugins</groupId>

                        <artifactId>maven-source-plugin</artifactId>

                        <version>2.4</version>

                        <executions>

                            <execution>

                                <id>attach-sources</id>

                                <goals>

                                    <goal>jar-no-fork</goal>

                                </goals>

                            </execution>

                        </executions>

                    </plugin>

                    <plugin>

                        <groupId>org.apache.maven.plugins</groupId>

                        <artifactId>maven-javadoc-plugin</artifactId>

                        <version>2.10.1</version>

                        <executions>

                            <execution>

                                <id>attach-javadocs</id>

                                <goals>

                                    <goal>jar</goal>

                                </goals>

                                <configuration>

                                    <!-- Add this to build Javadoc with JDK8

                                    <additionalparam>-Xdoclint:none</additionalparam>

                                    -->

                                </configuration>

                            </execution>

                        </executions>

                    </plugin>

                    <plugin>

                        <groupId>org.apache.maven.plugins</groupId>

                        <artifactId>maven-gpg-plugin</artifactId>