In this test case, an image is signed multiple times with different
keys. If any of signatures contained is not verified, the whole
authentication check should fail.
Signed-off-by: NAKASHI Takahiro <takahiro.akashi@linaro.org>

Provide a defined time stamp for dbx_hash1.auth.
Signed-off-by: NHeinrich Schuchardt <xypron.glpk@gmx.de>