test: route: move comments tests in news test to new file
test: route: move issue_categories test to new file
test: route: move issues tests to new file
test: route: move previews test in news test to routing/previews_test.rb
test: route: move context_menus test in test_issues_extra_actions to new file
test: route: move previews test in test_issues_extra_actions to new file
test: route: move versions test in projects test to routing/versions_test.rb
test: route: move welcome test to new file
test: route: move users tests to new file
test: route: move roles tests to new file
