[PATCH] nvmet: handle keep-alive timer when kato is modified by a set features cmd

[Sagi Grimberg]

> From: Amit <amit.engel at emc.com>

Can you please make sure your author reference has first
and last name (that matches your Signed-of-by).

> 
> A user may modify the kato by a set features cmd,
> In that case, the right flow is:
> - cancel the timer
> - update kato to the new value
> - start the timer again
> 
> Signed-off-by: Amit Engel <amit.engel at dell.com>

Besides that,

Reviewed-by: Sagi Grimberg <sagi at grimberg.me>