added shade plugin to properly include service descriptions

Author: fehguy

modules/swagger-codegen-distribution/pom.xml

@@ -41,14 +41,21 @@
       </plugin>
       <plugin>
         <groupId>org.apache.maven.plugins</groupId>
-        <artifactId>maven-jar-plugin</artifactId>
-        <configuration>
-          <archive>
-            <manifest>
-              <mainClass>com.wordnik.swagger.codegen.Codegen</mainClass>
-            </manifest>
-          </archive>
-        </configuration>
+        <artifactId>maven-shade-plugin</artifactId>
+        <version>2.3</version>
+        <executions>
+          <execution>
+            <phase>package</phase>
+            <goals>
+              <goal>shade</goal>
+            </goals>
+            <configuration>
+              <transformers>
+                <transformer implementation="org.apache.maven.plugins.shade.resource.ServicesResourceTransformer"/>
+              </transformers>
+            </configuration>
+          </execution>
+        </executions>
       </plugin>
     </plugins>
   </build>