v0.16.156

Changes

skipper: fix shutdown test (#2462)
Make test request in parallel to ensure another request is refused
not only after shutdown started but also while shutdown is still in progress
(i.e. while test request is still in progress).
Verify shutdown completes after test request is finished.
Rename tests to have the same prefix.
Updates #988 #1865

Docker image

Docker image is available in Zalando's Open Source registry:

docker run -it registry.opensource.zalan.do/teapot/skipper:v0.16.156 skipper --help
# arm64
docker run -it registry.opensource.zalan.do/teapot/skipper-arm64:v0.16.156 skipper --help
# arm v7 32bit
docker run -it registry.opensource.zalan.do/teapot/skipper-armv7:v0.16.156 skipper --help