[Bug 733070] scenario: add set_property scenario action

[GStreamer (bugzilla.gnome.org)]

https://bugzilla.gnome.org/show_bug.cgi?id=733070
  GStreamer | gst-devtools | unspecified

--- Comment #2 from Thiago Sousa Santos <thiagossantos at gmail.com> 2014-07-11 18:49:36 UTC ---
description, duration=20.0
set-property, target-element-name=videotestsrc0, property-name=name,
property-value="test", playback_time=10.0
eos, playback_time=20.0


Example scenario file

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