fix issue reported on the mailing list

git-svn-id: https://svn.apache.org/repos/asf/archiva/trunk@1556973 13f79535-47bb-0310-9956-ffa450edef68

archiva-modules/archiva-web/archiva-rest/archiva-rest-services/src/main/java/org/apache/archiva/rest/services/DefaultRepositoriesService.java

@@ -609,6 +609,7 @@ public class DefaultRepositoriesService
         if ( !VersionUtil.isGenericSnapshot( version ) )
         {
             Artifact artifact = new Artifact( namespace, projectId, version );
+            artifact.setRepositoryId( repositoryId );
             return deleteArtifact( artifact );
         }