Console test on z/OS
Console test on z/OS

The echo -n switch is not always available on z/OS, so 'echo -n' has
been changed to 'printf' so that the same test pattern can be
reliably produced across platforms.

Same goes for the seq program, so changed the sh loop to a go loop.

Signed-off-by: Neil Johnson <062f0b8c0a80c8e7db835c0e0bb46f21e76d5029@us.ibm.com>

containerd/console