v0.12.17

Changes

Fixes flaky metrics test (#1667)
Failure was reproduced via

go test -race -short -count=100 -run TestCodaHaleProxyMetrics github.com/zalando/skipper/metrics

tests use sleep anyway

Docker image

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

docker run -it registry.opensource.zalan.do/teapot/skipper:v0.12.17 skipper --help
# arm64
docker run -it registry.opensource.zalan.do/teapot/skipper-arm64:v0.12.17 skipper --help
# arm v7 32bit
docker run -it registry.opensource.zalan.do/teapot/skipper-armv7:v0.12.17 skipper --help