factorize before_filters and layout for projects related controllers

app/controllers/application_controller.rb

app/controllers/commits_controller.rb

app/controllers/deploy_keys_controller.rb

app/controllers/hooks_controller.rb

app/controllers/issues_controller.rb

app/controllers/labels_controller.rb

app/controllers/merge_requests_controller.rb

app/controllers/milestones_controller.rb

app/controllers/notes_controller.rb

app/controllers/project_controller.rb

app/controllers/projects_controller.rb

app/controllers/protected_branches_controller.rb

app/controllers/refs_controller.rb

app/controllers/repositories_controller.rb

app/controllers/snippets_controller.rb

app/controllers/team_members_controller.rb

app/controllers/wikis_controller.rb