Initial build for EPEL8

The RHEL/CentOS 8.1 is shipping python3-setuptools_scm-1.15.7-4.el8
which limit us to use tox 3.4(as 3.5.0 need setuptools_scm > 2).

Signed-off-by: Gris Ge <cnfourt@gmail.com>

tests/tests.yml

@@ -8,29 +8,11 @@
     - repo: "https://src.fedoraproject.org/tests/python.git"
       dest: "python"
     tests:
-    - smoke27:
-        dir: python/smoke
-        run: VERSION=2.7 METHOD=virtualenv ./venv.sh
-    - smoke34:
-        dir: python/smoke
-        run: VERSION=3.4 ./venv.sh
-    - smoke35:
-        dir: python/smoke
-        run: VERSION=3.5 ./venv.sh
     - smoke36:
         dir: python/smoke
         run: VERSION=3.6 ./venv.sh
-    - smoke37:
-        dir: python/smoke
-        run: VERSION=3.7 ./venv.sh
     required_packages:
     - gcc
-    - /usr/bin/virtualenv
-    - python27
-    - python34
-    - python35
     - python36
-    - python37
-    - python2-devel
     - python3-devel
     - python3-tox