integration-cli: tests for /etc/hosts and net=host

Some basic tests to make sure this is acting correctly on machines.

Docker-DCO-1.1-Signed-off-by: Brandon Philips <brandon.philips@coreos.com> (github: philips)
integration-cli: fix spelling error in test

Docker-DCO-1.1-Signed-off-by: Brandon Philips <brandon.philips@coreos.com> (github: philips)