Integration tests will now configure clients to propagate traces as well
as create spans for all tests.
Some extra changes were needed (or desired for trace propagation) in the
test helpers to pass through tracing spans via context.
Signed-off-by: Brian Goff <cpuguy83@gmail.com>
… and do not use the `docker` cli in it. One of the reason of this
move is to not make `integration` package using legacy
`integration-cli` package.
Next move will be to support swarm within this package *and* provide
some helper function using the api (compared to the one using cli in
`integration-cli/daemon` package).
Signed-off-by: Vincent Demeester <vincent@sbr.pm>