Specify the nodeset for zuul jobs

The py2.7 jobs need to specify xenial
The py3.6 jobs need to specify bionic
The focal zuul nodes only have python 3.8 installed in them

Zuul targets that invoke a generic python3 interpreter such
as pep8 is not specified.

The copyright date was updated in order to trigger
the zuul jobs, as a no-delta type of change.

Change-Id: If5352228a018f3147ae78172ae625066150c0a95
Partial-Bug: 1928978
Signed-off-by: albailey <Al.Bailey@windriver.com>

.zuul.yaml

@@ -27,6 +27,7 @@
     name: stx-distcloud-tox-py27
     parent: tox
     description: Run py27 for distcloud
+    nodeset: ubuntu-xenial
     required-projects:
       - starlingx/fault
       - starlingx/nfv
@@ -40,6 +41,7 @@
     name: stx-distcloud-tox-py36
     parent: tox
     description: Run py36 for distcloud
+    nodeset: ubuntu-bionic
     required-projects:
       - starlingx/fault
       - starlingx/nfv
@@ -53,6 +55,7 @@
     name: stx-distcloud-tox-pylint
     parent: tox
     description: Run pylint for distcloud
+    nodeset: ubuntu-bionic
     required-projects:
       - starlingx/fault
       - starlingx/nfv

distributedcloud/dcmanager/version.py

@@ -10,7 +10,7 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 #
-# Copyright (c) 2017 Wind River Systems, Inc.
+# Copyright (c) 2017-2021 Wind River Systems, Inc.
 #
 # The right to copy, distribute, modify, or otherwise make use
 # of this software may be licensed only pursuant to the terms