fix apache#2600, add javadoc plugin to dubbo-all module

all/pom.xml

@@ -549,4 +549,43 @@
             </plugin>
         </plugins>
     </build>
+
+    <profiles>
+        <profile>
+            <id>release</id>
+            <build>
+                <plugins>
+                    <plugin>
+                        <artifactId>maven-javadoc-plugin</artifactId>
+                        <version>${maven_javadoc_version}</version>
+                        <executions>
+                            <execution>
+                                <id>attach-javadoc</id>
+                                <goals>
+                                    <goal>jar</goal>
+                                </goals>
+                                <configuration>
+                                    <doclint>none</doclint>
+                                </configuration>
+                            </execution>
+                        </executions>
+                        <configuration>
+                            <includeDependencySources>true</includeDependencySources>
+                            <dependencySourceIncludes>
+                                <dependencySourceInclude>com.alibaba:dubbo-*</dependencySourceInclude>
+                                <dependencySourceExclude>com.alibaba:hessian-*</dependencySourceExclude>
+                            </dependencySourceIncludes>
+                            <show>public</show>
+                            <charset>UTF-8</charset>
+                            <encoding>UTF-8</encoding>
+                            <docencoding>UTF-8</docencoding>
+                            <links>
+                                <link>http://docs.oracle.com/javase/7/docs/api</link>
+                            </links>
+                        </configuration>
+                    </plugin>
+                </plugins>
+            </build>
+        </profile>
+    </profiles>
 </project>