Plugin execution not covered by lifecycle configuration: org.codehaus.mojo:build-helper-maven-plugin:1.8:add-test-source (execution: add-functional-source, phase: generate-sources)

Plugin execution not covered by lifecycle configuration: org.codehaus.mojo:build-helper-maven-plugin:1.8:add-test-source (execution: add-functional-source, phase: generate-sources)

<!-- 增加functional test的Source目录 -->
<plugin>
    <groupId>org.codehaus.mojo</groupId>
    <artifactId>build-helper-maven-plugin</artifactId>
    <executions>
        <execution>
            <id>add-functional-source</id>
            <phase>generate-sources</phase>
            <goals>
                <goal>add-test-source</goal>
            </goals>
            <configuration>
                <sources>
                    <source>src/test/functional</source>
                </sources>
            </configuration
        </execution>
    </executions>
</plugin>

<pluginManagement>
    <plugins>
        <!--This plugin's configuration is used to store Eclipse m2e settings only. It has no influence on the Maven build itself.-->
        <plugin>
            <groupId>org.eclipse.m2e</groupId>
            <artifactId>lifecycle-mapping</artifactId>
            <version>1.0.0</version>
            <configuration>
                <lifecycleMappingMetadata>
                    <pluginExecutions>
                        <pluginExecution>
                            <pluginExecutionFilter>
                                <groupId>
                                    org.codehaus.mojo
                                </groupId>
                                <artifactId>
                                    build-helper-maven-plugin
                                </artifactId>
                                <versionRange>
                                    [1.8,)
                                </versionRange>
                                <goals>
                                    <goal>add-source</goal>
                                </goals>
                            </pluginExecutionFilter>
                            <action>
                                <ignore></ignore>
                            </action>
                        </pluginExecution>
                    </pluginExecutions>
                </lifecycleMappingMetadata>
            </configuration>
        </plugin>
    </plugins>
</pluginManagement>