Allow specifying environment variables when installing an engine plugin
as a Swarm service. Invalid environment variable entries (without an
equals (`=`) char) will be ignored.
Signed-off-by: Sune Keller <absukl@almbrand.dk>
We really need to run those on the CI too at some point.
Signed-off-by: Vincent Demeester <vincent@sbr.pm>
Signed-off-by: Tibor Vass <tibor@docker.com>
