It doesn't make sense to use omitempty here. 0 is a meaningful value and
it's different from the default. If someone sets Parallelism to 0, we
want to show that Parallelism is 0, not hide the field.
Signed-off-by: Aaron Lehmann <aaron.lehmann@docker.com>
Upstream-commit: d8b8b129948ef8586f5b2f576533952419e302f2
Component: engine