logger: change swagger specification...
logger: change swagger specification...

...as part of the decision to use two named pipes
as logging destinations: one for human readable logs
and one for metrics.

Signed-off-by: Diana Popa <4240422768c1b315e51818a074064501037757cd@amazon.com>

firecracker-microvm/firecracker,firecracker-microvm/firecracker,firecracker-microvm/firecracker,firecracker-microvm/firecracker,firecracker-microvm/firecracker