key provider version alpha push

key provider version alpha push

use ckm-key-provider-dummy instead of SKMM library.
dummy library uses xor to unwrap/wrap KEK/DEKs
It's for testing other modules, so it will be improved.

ckm-key-provider.h : SKMM header.
ckm-key-provider-dummy.c : implementation of SKMM dummy
key-provider.cpp : implementation of key-provider

key-aes empty constructor empty implementation added for key-provider
one of key-provider API member function name changed
(decryptDEK -> unwrapDEK)

please feedback at any points.

Change-Id: I5dea33d9bacc2c944ae14e77fd0c00c35bd136e1
Signed-off-by: kyungwook tak <k.tak@samsung.com>