Can't copy source project's resource directory content

[liweinan]

@ronsigal I have created this PR to automate the test class processing steps, but it needs the resources directory to be copied into the generated bridge project.

I tried to configure the maven-dependency-plugin correctly to copy the resources dir but failed:

  <plugin>
                <artifactId>maven-dependency-plugin</artifactId>
                <version>${maven-dependency-plugin.version}</version>
                <executions>
                    <execution>
                        <id>unpack</id>
                        <phase>initialize</phase>
                        <goals>
                            <goal>unpack</goal>
                        </goals>
                        <configuration>
                            <artifactItems>
                                <artifactItem>
                                    <groupId>${groupId}</groupId>
                                    <artifactId>${artifactId}</artifactId>
                                    <version>${version}</version>
                                    <classifier>sources</classifier>
                                    <overWrite>true</overWrite>
                                    <outputDirectory>${project.basedir}/src/main/java</outputDirectory>
                                    <outputDirectory>${project.basedir}/src/main/resources</outputDirectory>
                                </artifactItem>
                            </artifactItems>
                        </configuration>
                    </execution>
                </executions>
            </plugin>

Could you please help to check this? Thanks!