Setup Phabricator import

This sets up all the basics for importing Phabricator tasks into
GitLab issues.

To import all tasks from a Phabricator instance into GitLab, we'll
import all of them into a new project that will have its repository
disabled.

The import is hooked into a regular ProjectImport setup, but similar
to the GitHub parallel importer takes care of all the imports itself.

In this iteration, we're importing each page of tasks in a separate
sidekiq job.

The first thing we do when requesting a new page of tasks is schedule
the next page to be imported. But to avoid deadlocks, we only allow a
single job per worker type to run at the same time.

For now we're only importing basic Issue information, this should be
extended to richer information.

1 files changed, 2 insertions, 0 deletions

diff --git a/config/routes/import.rb b/config/routes/import.rb
index 24013eb2c88..9fe2688de1e 100644
--- a/config/routes/import.rb
+++ b/config/routes/import.rb
@@ -67,4 +67,6 @@ namespace :import do
     get :jobs
     post :upload
   end
+
+  resource :phabricator, only: [:create, :new], controller: :phabricator
 end