Add smoke gating test

.fmf/version

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+1

plans/runtest.sh

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+#!/bin/sh -eux
+
+# Create testing iso image
+rm -rf ./isocontent
+mkdir isocontent
+dd if=/dev/zero of=isocontent/big_enough_file  bs=500K  count=1
+mkisofs -o test.iso isocontent
+
+# Implant and check md5 sum
+implantisomd5 test.iso
+checkisomd5 --verbose test.iso
+
+# Destroy testing iso image
+rm -rf ./isocontent
+rm test.iso

plans/smoke.fmf

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+summary: Basic smoke test
+prepare:
+    how: install
+    package: [genisoimage, coreutils, isomd5sum]
+execute:
+    script: plans/runtest.sh