Avoid setting uid and gid to 0.
Avoid setting uid and gid to 0.

This code was apparently added to work around another problem and now
Setuid(0) fails with "operation not permitted" in a privileged
container, so seems to be doing more harm than good.

[#90094414]

cloudfoundry-incubator/garden-linux,cloudfoundry-incubator/garden-linux,cloudfoundry-incubator/garden-linux