upgrade invoker plugin

git-svn-id: https://svn.apache.org/repos/asf/maven/plugins/trunk@1171794 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/pom.xml b/pom.xml
index 14a54ac..42a16a0 100644
--- a/pom.xml
+++ b/pom.xml
@@ -316,7 +316,7 @@
       <plugin>
         <groupId>org.apache.maven.plugins</groupId>
         <artifactId>maven-changelog-plugin</artifactId>
-        <version>2.1</version>
+        <version>2.2</version>
       </plugin>
     </plugins>
   </reporting>
@@ -327,8 +327,9 @@
       <build>
         <plugins>
           <plugin>
+            <groupId>org.apache.maven.plugins</groupId>
             <artifactId>maven-invoker-plugin</artifactId>
-            <version>1.4</version>
+            <version>1.5</version>
             <configuration>
               <projectsDirectory>src/it</projectsDirectory>
               <cloneProjectsTo>${project.build.directory}/it</cloneProjectsTo>