Fix bug that the instance is not deleted correctly.

Fix bug that the instance is not deleted correctly.

[model] Redwood
[binary_type] AP
[customer] Docomo/Orange/Open
[issue#] N/A
[problem] Instance is not deleted correctly (in the master), Optimize the log
[cause] even though I tried to delete an instance, if an instance state is "DESTROYED", we cannot delete it.
[solution] state_reset must reset the state of an instance even if its state is DESTROYED, reset it to INIT.
[team] HomeTF
[request]
[horizontal_expansion]

Change-Id: I3b242133909ef6e16e652dd6cff769603dac8350