split all non-cli portions into a new internal/test/environment package
Set a test environment on packages instead of creating new ones.
Signed-off-by: Daniel Nephin <dnephin@docker.com>
This adds a new package `integration` where `engine` integration tests
should live. Those integration tests should not depends on any `cli`
components (except from the `dockerd` daemon for now — to actually
start a daemon).
Signed-off-by: Vincent Demeester <vincent@sbr.pm>
