Add CI tests using the standard test interface

Adding initial set of basic functionality tests for ksh according
to the CI wiki [1] and the Standard Test Interface [2]. Instead of
copying the test code this pull request links tests from the new shared
shell tests repo and fetches them using the "repositories" option [3].

[1] https://fedoraproject.org/wiki/CI
[2] https://fedoraproject.org/wiki/Changes/InvokingTests
[3] https://pagure.io/standard-test-roles/pull-request/101

tests/tests.yml

@@ -0,0 +1,41 @@
+---
+
+# Tests that run in classic context
+- hosts: localhost
+  roles:
+  - role: standard-test-beakerlib
+    tags:
+    - classic
+    repositories:
+    - repo: "https://src.fedoraproject.org/tests/shell.git"
+      dest: "shell"
+    tests:
+    - shell/func
+    - shell/login
+    - shell/smoke
+    environment:
+      PACKAGES: ksh
+      SH_BIN: ksh
+    required_packages:
+    - ksh
+    - expect            # login requires expect
+    - which             # smoke requires which
+
+# Tests that run in container
+- hosts: localhost
+  roles:
+  - role: standard-test-beakerlib
+    tags:
+    - container
+    repositories:
+    - repo: "https://src.fedoraproject.org/tests/shell.git"
+      dest: "shell"
+    tests:
+    - shell/func
+    - shell/smoke
+    environment:
+      PACKAGES: ksh
+      SH_BIN: ksh
+    required_packages:
+    - ksh
+    - which             # smoke requires which