Don't error out on plugin err with json
Don't error out on plugin err with json

We don't want to error out when there is a json unmarshal error since
the `old way` will cause this to error.

Signed-off-by: Brian Goff <dc73d0991b982a8303e713ef531a313af77e242a@gmail.com>

aditirajagopal/docker,aditirajagopal/docker,aditirajagopal/docker