Bug 804: Fixed unstable test.

This patch fixes bug for unit test that the result was affected by
the order of test cases.

Change-Id: I2fa948882e7204e3cfd186c33490c13b8b49d9fc
Signed-off-by: Shigeru Yasuda <s-yasuda@da.jp.nec.com>
(cherry picked from commit 09fcfab6cbcc67add0e6c943033ad599e5f83b08)