Fix some specs

app/controllers/admin/projects_controller.rb

app/controllers/projects/application_controller.rb

app/models/project.rb

app/views/events/event/_common.html.haml

...te/20160320204112_index_namespaces_on_visibility_level.rb

db/schema.rb

features/steps/shared/group.rb

spec/controllers/application_controller_spec.rb

spec/lib/banzai/filter/redactor_filter_spec.rb

spec/models/project_security_spec.rb

spec/requests/api/groups_spec.rb