Fedora CI: Cleanup for Fedora 32 EOL and prepare for Python 3.5 retirement

Fedora 32 was the last one to include Python 3.4
https://fedoraproject.org/wiki/Changes/RetirePython34

Fedora 35 will be the first one not to include Python 3.5
https://fedoraproject.org/wiki/Changes/RetirePython3.5

tests/tests.yml

@@ -30,12 +30,9 @@
     - smoke27:
         dir: python/smoke
         run: VERSION=2.7 METHOD=virtualenv ./venv.sh
-    - smoke34_optional:
+    - smoke35_optional:
         dir: python/smoke
-        run: VERSION=3.4 INSTALL_OR_SKIP=true ./venv.sh
-    - smoke35:
-        dir: python/smoke
-        run: VERSION=3.5 ./venv.sh
+        run: VERSION=3.5 INSTALL_OR_SKIP=true ./venv.sh
     - smoke36:
         dir: python/smoke
         run: VERSION=3.6 ./venv.sh
@@ -64,7 +61,6 @@
     - gcc
     - virtualenv
     - python2.7
-    - python3.5
     - python3.6
     - python3.7
     - python3.8