Add GitLab Geo Planned Failover doc

Closes #4397

See merge request gitlab-org/gitlab-ee!4392

[EE port] 26388 push to create a new project

See merge request gitlab-org/gitlab-ee!4408

Resolve "gitlab-rake gitlab:geo:check doesn't work"

Closes #4820

See merge request gitlab-org/gitlab-ee!4402

Migrate uploads rake task

Closes #4704

See merge request gitlab-org/gitlab-ee!4215

Resolve "spec/ee/spec/services/ee/projects/destroy_service_spec.rb is failing"

See merge request gitlab-org/gitlab-ee!4409

CE upstream - 2018-02-06 09:41 UTC

Closes gitlab-qa#175, #4803, and gitaly#991

See merge request gitlab-org/gitlab-ee!4395

Reset Project's column information in spec/lib/gitlab/background_migration/populate_merge_request_metrics_with_events_data_spec.rb
Signed-off-by: Rémy Coutable <remy@rymai.me>

moved migration to correct place in ee folder

See merge request gitlab-org/gitlab-ee!4398

Signed-off-by: Rémy Coutable <remy@rymai.me>

Replace "cluster" with "Kubernetes cluster" (EE port)

Closes gitlab-ce#41963

See merge request gitlab-org/gitlab-ee!4345

mainly renaming `object_storage:object_storage_background_upload` to `*_move`

Adds Rack Attack disabled by default notice to the docs

See merge request gitlab-org/gitlab-ee!4399

Support SendURL for performing indirect download of artifacts if clients does…

See merge request gitlab-org/gitlab-ee!4401