test: fix answer table values for landmark detection

test: fix answer table values for landmark detection

[Issue type] bug fix

Fix answer table values for landmark detection test case.
With a new patch[1], 'confidence_threshold' value is used to check
valid detection result for pose detection task - its specific class is PldCpm
class. Without this patch, landmark detection test cases will fail.
This patch updates the answer table values of relevant test cases correctly.

[1] https://review.tizen.org/gerrit/#/c/platform/core/api/mediavision/+/300755/

Change-Id: Id0219912d9c912bb4f4b597a968a3ba9213bfa9d
Signed-off-by: Inki Dae <inki.dae@samsung.com>