request_key/request_key02.c: add new testcase

1) request_key(2) fails if no matching key was found and
   set errno to ENOKEY.
2) request_key(2) fails if a revoked key was found and
   set errno to EKEYREVOKED.
3) request_key(2) fails if an expired key was found and
   set errno to EKEYEXPIRED.

Signed-off-by: Xiao Yang <yangx.jy@cn.fujitsu.com>
Signed-off-by: Cyril Hrubis <chrubis@suse.cz>
4 files changed