Fix the missed update event handling bug.

Fix the missed update event handling bug.

[model] Redwood
[binary_type] AP
[customer] Docomo/Orange/Open
[issue#] N/A
[problem] While upating contents, if a user event occured (resize, click, etc, ..), the updating process is not completed successfully.
[cause] even though the content file is updated several times, the inotify event is occured only once.
[solution] While updating contents, even if a user events are occurred, merge them into A updated event.
[team] HomeTF
[request]
[horizontal_expansion]

Change-Id: Ib9af807b864c4e8c837d1ecae343b3b3ebb22eee