Add support for python 3.8

Introduce support of python 3.8 [1] and move tox and jobs to py38.

jsonschema 3.2.0 [2] support python 3.8

[1] https://governance.openstack.org/tc/reference/runtimes/victoria.html#python-runtimes-for-victoria
[2] https://github.com/Julian/jsonschema/pull/627

Change-Id: I34a47d6fe90da33215c4551a868644e5d6c8906c

lower-constraints.txt

@@ -28,7 +28,7 @@ Jinja2==2.10
 jmespath==0.9.0
 jsonpatch==1.16
 jsonpointer==1.13
-jsonschema==2.6.0
+jsonschema==3.2.0
 keystoneauth1==3.4.0
 linecache2==1.0.0
 MarkupSafe==1.0

requirements.txt

@@ -29,5 +29,5 @@ python-keystoneclient>=3.8.0 # Apache-2.0
 keystoneauth1>=3.4.0 # Apache-2.0
 tenacity>=4.4.0 # Apache-2.0
 metalsmith>=0.13.0 # Apache-2.0
-jsonschema>=2.6.0 # MIT
+jsonschema>=3.2.0 # MIT
 requests>=2.18.0,!=2.20.0  # Apache-2.0

setup.cfg

@@ -19,6 +19,7 @@ classifier =
     Programming Language :: Python :: 3
     Programming Language :: Python :: 3.6
     Programming Language :: Python :: 3.7
+    Programming Language :: Python :: 3.8
 
 [files]
 packages =

tox.ini

@@ -1,6 +1,6 @@
 [tox]
 minversion = 3.8
-envlist = linters,py37
+envlist = linters,py38
 skipsdist = True
 
 [testenv]

zuul.d/layout.yaml

@@ -14,11 +14,13 @@
         - openstack-tox-linters
         - openstack-tox-py36
         - openstack-tox-py37
+        - openstack-tox-py38
         - tripleo-ci-centos-8-containers-multinode:
             dependencies: &deps_unit_lint
               - openstack-tox-linters
               - openstack-tox-py36
               - openstack-tox-py37
+              - openstack-tox-py38
         - tripleo-ci-centos-8-undercloud-containers:
             dependencies: *deps_unit_lint
         - tripleo-ci-centos-8-standalone: