Test Tobiko against Python 3.8.2

Change-Id: I3ffb8ddc33f2f72a0e34c6bbc84452ecdcebff04

playbooks/tox-py38/pre.yaml

@@ -1,13 +0,0 @@
----
-
-- hosts: all
-  roles:
-    - role: ../roles/python
-      vars:
-        python_command: python3.8
-        python_version: "3.8"
-        python_release: "3.8.0"
-        pip_command: pip3.8
-        pip_install_packages:
-          - virtualenv
-          - tox

playbooks/unit/pre.yaml

@@ -0,0 +1,12 @@
+---
+
+- hosts: all
+  roles:
+    - role: tobiko-compile-python
+      vars:
+        python_command: "python{{ python_version }}"
+        python_version: "{{ python_release.split('.')[:2] | join('.') }}"
+        pip_command: "pip{{ python_version }}"
+        pip_install_packages:
+          - virtualenv
+          - tox