Fix Hook.new call sites in tests

spec/features/projects/import_export/import_file_spec.rb

@@ -99,6 +99,6 @@ feature 'Import/Export - project import integration test', js: true do
   end
 
   def project_hook_exists?(project)
-    Gitlab::Git::Hook.new('post-receive', project).exists?
+    Gitlab::Git::Hook.new('post-receive', project.repository.raw_repository).exists?
   end
 end

spec/lib/gitlab/import_export/repo_restorer_spec.rb

@@ -34,7 +34,7 @@ describe Gitlab::ImportExport::RepoRestorer do
     it 'has the webhooks' do
       restorer.restore
 
-      expect(Gitlab::Git::Hook.new('post-receive', project)).to exist
+      expect(Gitlab::Git::Hook.new('post-receive', project.repository.raw_repository)).to exist
     end
   end
 end