CE upstream - 2018-09-07 16:58 UTC

Closes #6948, gitlab-ce#51225, gitlab-ce#40529, gitaly#954, and #7482

See merge request gitlab-org/gitlab-ee!7285

If one spec disables the usage ping in the in-memory application setting
(e.g. spec/features/usage_stats_consent_spec.rb), then this spec will
fail. To work around this problem, we enable the usage ping explicitly
in the setup phase.

Closes #7511

(Port from CE) Resolve "Create new project: Re-add project name field"

See merge request gitlab-org/gitlab-ee!7279

Geo: backend support to allow Secondary node to push to a Primary as push proxying

See merge request gitlab-org/gitlab-ee!6455

SSH git push to secondary -> proxy to Primary

See merge request gitlab-org/gitlab-ee!6456

CE counterpart: https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/21607

(Port from CE) Document how to specify environment variables during manual…

See merge request gitlab-org/gitlab-ee!7260

update gitlab-svg version to match ce

See merge request gitlab-org/gitlab-ee!7288

Update documentation for compliance with CommonMark

See merge request gitlab-org/gitlab-ee!7184

Solve conflicts from gitlab-ce/merge_requests!20758

See merge request gitlab-org/gitlab-ee!6812