There is no need to add hardcoded .test suffix when determining the
base RMA key file name.
BRANCH=none
BUG=none
TEST=succeeded signing both prod and pre-pvt images.
Change-Id: I59a5eb4ff8c093110c4d29969974148c99bd62a0
Signed-off-by: Vadim Bendebury <vbendeb@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/1099731
Reviewed-by: Randall Spangler <rspangler@chromium.org>