add time attribute in testcase element

Signed-off-by: olivier lamy <olamy@apache.org>
diff --git a/src/main/java/org/apache/maven/plugins/invoker/AbstractInvokerMojo.java b/src/main/java/org/apache/maven/plugins/invoker/AbstractInvokerMojo.java
index e46dab3..730e0dc 100644
--- a/src/main/java/org/apache/maven/plugins/invoker/AbstractInvokerMojo.java
+++ b/src/main/java/org/apache/maven/plugins/invoker/AbstractInvokerMojo.java
@@ -1901,6 +1901,7 @@
         }

         testcase.setAttribute( "classname", junitPackageName + "." + safeFileName );

         testcase.setAttribute( "name", safeFileName );

+        testcase.setAttribute( "time", Double.toString( buildJob.getTime() ) );

         Xpp3Dom systemOut = new Xpp3Dom( "system-out" );

         testcase.addChild( systemOut );