Merge branch 'sh-bump-git-2.16' into 'master'

Bump GitLab CI image to use git 2.16

See merge request gitlab-org/gitlab-ce!17440

.gitlab-ci.yml

-image: "dev.gitlab.org:5005/gitlab/gitlab-build-images:ruby-2.3.6-golang-1.9-git-2.14-chrome-63.0-node-8.x-yarn-1.2-postgresql-9.6"
+image: "dev.gitlab.org:5005/gitlab/gitlab-build-images:ruby-2.3.6-golang-1.9-git-2.16-chrome-63.0-node-8.x-yarn-1.2-postgresql-9.6"
 
 .dedicated-runner: &dedicated-runner
   retry: 1

spec/support/gitlab-git-test.git/packed-refs

-# pack-refs with: peeled fully-peeled 
+# pack-refs with: peeled fully-peeled sorted 
 0b4bc9a49b562e85de7cc9e834518ea6828729b9 refs/heads/feature
 12d65c8dd2b2676fa3ac47d955accc085a37a9c1 refs/heads/fix
 6473c90867124755509e100d0d35ebdc85a0b6ae refs/heads/fix-blob-path