Revert few more broken specs related to *_with_namespace methods

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

spec/controllers/autocomplete_controller_spec.rb

@@ -246,7 +246,7 @@ describe AutocompleteController do
           expect(json_response.size).to eq(1)
 
           expect(json_response.first['id']).to eq authorized_project.id
-          expect(json_response.first['full_name']).to eq authorized_project.full_name
+          expect(json_response.first['name_with_namespace']).to eq authorized_project.full_name
         end
       end
     end
@@ -267,7 +267,7 @@ describe AutocompleteController do
           expect(json_response.size).to eq(1)
 
           expect(json_response.first['id']).to eq authorized_search_project.id
-          expect(json_response.first['full_name']).to eq authorized_search_project.full_name
+          expect(json_response.first['name_with_namespace']).to eq authorized_search_project.full_name
         end
       end
     end

spec/workers/concerns/gitlab/github_import/object_importer_spec.rb

@@ -25,7 +25,7 @@ describe Gitlab::GithubImport::ObjectImporter do
       importer_class = double(:importer_class)
       importer_instance = double(:importer_instance)
       representation = double(:representation)
-      project = double(:project, path_with_namespace: 'foo/bar')
+      project = double(:project, full_path: 'foo/bar')
       client = double(:client)
 
       expect(worker)