[pkg-go] docker-libkv is marked for autoremoval from testing

[Debian testing autoremoval watch]

docker-libkv 0.2.0-1 is marked for autoremoval from testing on 2016-08-23

It (build-)depends on packages with these RC bugs:
830727: golang-github-magiconair-properties: FTBFS: go test -v github.com/magiconair/properties [..] circular reference