Bug#891356: Pending fixes for bugs in the golang-google-cloud package

[pkg-go-maintainers]

tag 891356 + pending
thanks

Some bugs in the golang-google-cloud package are closed in revision
ab9eb22e3ef390307c5b9fc7e79460aac06762e4 in branch 'master' by
Martín Ferrari

The full diff can be seen at
https://anonscm.debian.org/cgit/pkg-go/packages/golang-google-cloud.git/commit/?id=ab9eb22

Commit message:

    Fix racy spanner test. Closes: #891356