Add docker API name in logs
Add docker API name in logs

Currently generic message is logged to report DockerError which
doesn't let users know which API raised the error. A single container
related operation can have multiple docker calls. So this patch tries
to add the API name in error logs.

Change-Id: I2a5d66eacc6b8bb10702e2e1ae07d4df79ceaccc

kevin-zhaoshuai/zun,kevin-zhaoshuai/zun,kevin-zhaoshuai/zun