Fix sources goal for multimodule projects

Signed-off-by: Juan Manuel Leflet Estrada <jleflete@redhat.com>

src/it/projects/sources/module-a/pom.xml

@@ -0,0 +1,48 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+  ~ Licensed to the Apache Software Foundation (ASF) under one
+  ~ or more contributor license agreements.  See the NOTICE file
+  ~ distributed with this work for additional information
+  ~ regarding copyright ownership.  The ASF licenses this file
+  ~ to you under the Apache License, Version 2.0 (the
+  ~ "License"); you may not use this file except in compliance
+  ~ with the License.  You may obtain a copy of the License at
+  ~
+  ~   http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing,
+  ~ software distributed under the License is distributed on an
+  ~ "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+  ~ KIND, either express or implied.  See the License for the
+  ~ specific language governing permissions and limitations
+  ~ under the License.
+  -->
+
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+  <modelVersion>4.0.0</modelVersion>
+
+  <parent>
+    <groupId>org.apache.maven.its.dependency</groupId>
+    <artifactId>tree-multimodule</artifactId>
+    <version>1.0-SNAPSHOT</version>
+  </parent>
+
+  <name>MultimoduleTest Module A</name>
+
+  <artifactId>tree-multimodule-module-a</artifactId>
+
+  <properties>
+    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+  </properties>
+
+  <dependencies>
+    <dependency>
+      <groupId>org.apache.maven</groupId>
+      <artifactId>maven-project</artifactId>
+      <version>2.0.6</version>
+    </dependency>
+  </dependencies>
+
+</project>

src/it/projects/sources/module-b/pom.xml

@@ -0,0 +1,48 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+  ~ Licensed to the Apache Software Foundation (ASF) under one
+  ~ or more contributor license agreements.  See the NOTICE file
+  ~ distributed with this work for additional information
+  ~ regarding copyright ownership.  The ASF licenses this file
+  ~ to you under the Apache License, Version 2.0 (the
+  ~ "License"); you may not use this file except in compliance
+  ~ with the License.  You may obtain a copy of the License at
+  ~
+  ~   http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing,
+  ~ software distributed under the License is distributed on an
+  ~ "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+  ~ KIND, either express or implied.  See the License for the
+  ~ specific language governing permissions and limitations
+  ~ under the License.
+  -->
+
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+  <modelVersion>4.0.0</modelVersion>
+
+  <parent>
+    <groupId>org.apache.maven.its.dependency</groupId>
+    <artifactId>tree-multimodule</artifactId>
+    <version>1.0-SNAPSHOT</version>
+  </parent>
+
+  <name>MultimoduleTest Module B</name>
+
+  <artifactId>tree-multimodule-module-b</artifactId>
+
+  <properties>
+    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+  </properties>
+
+  <dependencies>
+    <dependency>
+      <groupId>org.apache.maven.its.dependency</groupId>
+      <artifactId>tree-multimodule-module-a</artifactId>
+      <version>${project.version}</version>
+    </dependency>
+  </dependencies>
+
+</project>

src/it/projects/sources/pom.xml

@@ -24,24 +24,22 @@
   <modelVersion>4.0.0</modelVersion>
 
   <groupId>org.apache.maven.its.dependency</groupId>
-  <artifactId>test</artifactId>
+  <artifactId>tree-multimodule</artifactId>
   <version>1.0-SNAPSHOT</version>
+  <packaging>pom</packaging>
 
-  <name>Test</name>
+  <name>MultimoduleTest</name>
   <description>
-    Test dependency:sources
+    Test dependency:tree on multimodule project
   </description>
 
   <properties>
     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
   </properties>
 
-  <dependencies>
-    <dependency>
-      <groupId>org.apache.maven</groupId>
-      <artifactId>maven-project</artifactId>
-      <version>2.0.8</version>
-    </dependency>
-  </dependencies>
+  <modules>
+    <module>module-a</module>
+    <module>module-b</module>
+  </modules>
 
 </project>

src/main/java/org/apache/maven/plugins/dependency/resolvers/ResolveDependencySourcesMojo.java

@@ -32,7 +32,7 @@
 @Mojo(
         name = "sources",
         defaultPhase = LifecyclePhase.GENERATE_SOURCES,
-        requiresDependencyResolution = ResolutionScope.TEST,
+        requiresDependencyCollection = ResolutionScope.TEST,
         threadSafe = true)
 public class ResolveDependencySourcesMojo extends ResolveDependenciesMojo {