Merge branch 'zj-namespace-gitaly-opt-out' into 'master'

Move Namespace to Gitaly using OPT-OUT

See merge request gitlab-org/gitlab-ce!15910

lib/gitlab/shell.rb

@@ -294,7 +294,8 @@ module Gitlab
     #   add_namespace("/path/to/storage", "gitlab")
     #
     def add_namespace(storage, name)
-      Gitlab::GitalyClient.migrate(:add_namespace) do |enabled|
+      Gitlab::GitalyClient.migrate(:add_namespace,
+                                   status: Gitlab::GitalyClient::MigrationStatus::OPT_OUT) do |enabled|
         if enabled
           gitaly_namespace_client(storage).add(name)
         else
@@ -315,7 +316,8 @@ module Gitlab
     #   rm_namespace("/path/to/storage", "gitlab")
     #
     def rm_namespace(storage, name)
-      Gitlab::GitalyClient.migrate(:remove_namespace) do |enabled|
+      Gitlab::GitalyClient.migrate(:remove_namespace,
+                               status: Gitlab::GitalyClient::MigrationStatus::OPT_OUT) do |enabled|
         if enabled
           gitaly_namespace_client(storage).remove(name)
         else
@@ -333,7 +335,8 @@ module Gitlab
     #   mv_namespace("/path/to/storage", "gitlab", "gitlabhq")
     #
     def mv_namespace(storage, old_name, new_name)
-      Gitlab::GitalyClient.migrate(:rename_namespace) do |enabled|
+      Gitlab::GitalyClient.migrate(:rename_namespace,
+                                   status: Gitlab::GitalyClient::MigrationStatus::OPT_OUT) do |enabled|
         if enabled
           gitaly_namespace_client(storage).rename(old_name, new_name)
         else
@@ -368,7 +371,8 @@ module Gitlab
     #
     # Gitaly migration: https://gitlab.com/gitlab-org/gitaly/issues/385
     def exists?(storage, dir_name)
-      Gitlab::GitalyClient.migrate(:namespace_exists) do |enabled|
+      Gitlab::GitalyClient.migrate(:namespace_exists,
+                                   status: Gitlab::GitalyClient::MigrationStatus::OPT_OUT) do |enabled|
         if enabled
           gitaly_namespace_client(storage).exists?(dir_name)
         else