Backport gating tests from c9s

Gating tests now enforce `osci.brew-build.tier0.functional` for c8s.
Backport the gating test definition from c9s to c8s.

Resolves: rhbz#2172416

.gitignore

@@ -1,2 +1,4 @@
 SOURCES/cffi-1.11.5.tar.gz
 /cffi-1.11.5.tar.gz
+/artifacts
+/tests/artifacts

tests/tests.yml

@@ -0,0 +1,23 @@
+---
+
+# 1minutetip --buildroot
+
+- hosts: localhost
+  tags:
+  - classic
+  roles:
+  - role: standard-test-source
+
+  - role: standard-test-basic
+    required_packages:
+    - python3-cffi
+    - python3-pytest
+    - python3-devel
+    - gcc
+    tests:
+    - unittests:
+        dir: "source"
+        # cffi1 and test_version depend on files that are not packaged
+        run: >-
+            rm -rf cffi* testing/cffi0/test_version.py &&
+            pytest-3 testing/cffi0