Merge branch 'zj-dev-setup-gitaly-check' into 'master'

Check Gitaly when running `rake dev:setup`

See merge request gitlab-org/gitlab-ce!18481

lib/tasks/gitlab/setup.rake

 namespace :gitlab do
   desc "GitLab | Setup production application"
   task setup: :gitlab_environment do
+    check_gitaly_connection
     setup_db
   end
 
+  def check_gitaly_connection
+    Gitlab.config.repositories.storages.each do |name, _details|
+      Gitlab::GitalyClient::ServerService.new(name).info
+    end
+  rescue GRPC::Unavailable => ex
+    puts "Failed to connect to Gitaly...".color(:red)
+    puts "Error: #{ex}"
+    exit 1
+  end
+
   def setup_db
     warn_user_is_not_gitlab