Add a smoke test

Upstreamed from rhel's Sanity/smoke

Commit hash: a3e2fcfaef1fe4ffa257bdc21d535c9cdc35cafd
Only the test file was kept.

Co-Authored-By: Braňo Náter <bnater@redhat.com>

.fmf/version

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+1

plans.fmf

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+discover:
+    how: fmf
+execute:
+    how: tmt

tests/smoke/smoke.fmf

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+test: python3 test.py
+framework: shell
+require:
+- python3
+- python3-urllib3

tests/smoke/test.py

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+import urllib3
+
+http = urllib3.PoolManager()
+r = http.request('GET', 'http://example.com/')
+print('status = {0}'.format(r.status))
+print("headers['server'] = {0}".format(r.headers['server']))
+print(r.data)
+if r.status != 200 or not r.data:
+    raise SystemExit(1)