Revert "Swap loopback and veth strategies in Networks list"

This reverts commit 3b8b2c8454171d79bed5e9a80165172617e92fc7.

Docker-DCO-1.1-Signed-off-by: Timothy Hobbs <timothyhobbs@seznam.cz> (github: https://github.com/timthelion)
When initializing networks, only return from the loop if there is an error

Docker-DCO-1.1-Signed-off-by: Timothy Hobbs <timothyhobbs@seznam.cz> (github: https://github.com/timthelion)