Fix for double free in RE cache unit test.

Fix for double free in RE cache unit test.

[Problem]
When RE cache unit test is terminated,
always will crash af double free.

[Reason]
double freed valiable is shared pointer of mock object.
this pointer will remove twice on release of mock object and shared pointer.

[Fix]
Deleter as non-operation was added on the creation of shared pointer.

Change-Id: I6434795fd011312b1a9bcb5ecf0d092aab19b487
Signed-off-by: KIM JungYong <jyong2.kim@samsung.com>
Reviewed-on: https://gerrit.iotivity.org/gerrit/18893
Reviewed-by: Jay  Sharma <jay.sharma@samsung.com>
Tested-by: jenkins-iotivity <jenkins@iotivity.org>
Reviewed-by: Uze Choi <uzchoi@samsung.com>