Remove redundant code from container registry classes

app/controllers/projects/registry/repositories_controller.rb

@@ -34,7 +34,7 @@ module Projects
           break if path.has_repository?
           ContainerRepository.build_from_path(path).tap do |repository|
-            repository.save if repository.has_tags?
+            repository.save! if repository.has_tags?
           end
         end
       end

app/models/container_repository.rb

@@ -28,7 +28,7 @@ class ContainerRepository < ActiveRecord::Base
   end
   def manifest
-    @manifest ||= client.repository_tags(self.path)
+    @manifest ||= client.repository_tags(path)
   end
   def tags
@@ -45,7 +45,7 @@ class ContainerRepository < ActiveRecord::Base
   end
   def has_tags?
-    tags.to_a.any?
+    tags.any?
   end
   def root_repository?

spec/lib/container_registry/blob_spec.rb

@@ -2,7 +2,7 @@ require 'spec_helper'
 describe ContainerRegistry::Blob do
   let(:group) { create(:group, name: 'group') }
-  let(:project) { create(:project, path: 'test', group: group) }
+  let(:project) { create(:empty_project, path: 'test', group: group) }
   let(:repository) do
     create(:container_repository, name: 'image',