Merge branch 'fix/gitlab-import-data' into 'master'

fix typo making gitlab.com importing to fail

Fixes https://gitlab.com/gitlab-org/gitlab-ee/issues/565

See merge request !4181

lib/gitlab/gitlab_import/importer.rb

@@ -5,7 +5,7 @@ module Gitlab
 
       def initialize(project)
         @project = project
-        credentials = import_data
+        credentials = project.import_data
         if credentials && credentials[:password]
           @client = Client.new(credentials[:password])
           @formatter = Gitlab::ImportFormatter.new