[Merge] lp:~unity-api-team/process-cpp/apparmor-exec into lp:process-cpp

[Thomas Voß]

Review: Needs Fixing

LGTM, except for a test missing. Some rudimentary test-case would be enough for me, just to make sure that the implementation calls the given functor.
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https://code.launchpad.net/~unity-api-team/process-cpp/apparmor-exec/+merge/220452
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