Add ubuntu20 build target

Skip-PR-comments: true
PR-repos-ubuntu20: dtcmp@PR-6:lastBuild mpich@PR-64:lastBuild lwgrp@PR-6:lastBuild libcircle@PR-6:lastBuild hdf5-vol-daos@PR-38:lastBuild hdf5@PR-38:lastBuild daos@PR-11205:73
Required-githooks: true

Signed-off-by: Brian J. Murrell <brian.murrell@intel.com>

Author: brianjmurrell

Jenkinsfile

@@ -1,5 +1,5 @@
 #!/usr/bin/groovy
-/* Copyright (C) 2020 Intel Corporation
+/* Copyright (C) 2019-2023 Intel Corporation
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -40,5 +40,5 @@
 // I.e. for testing library changes
 //@Library(value="pipeline-lib@your_branch") _
 
-packageBuildingPipelineDAOSTest(['distros' : ['el8', 'leap15'], 'test-tag': 'mfu'])
-
+packageBuildingPipelineDAOSTest(['distros' : ['el8', 'leap15', 'ubuntu20.04'],
+                                 'test-tag': 'mfu'])