SubMapper.connect allows in Routes<=2.2 to define routes with/without a
name:
map.connect(route_name, route_path)
map.connect(route_path)
Routes==2.3 SubMapper.connect now requires a route name (but not
Mapper.connect). This change adds a route name when needed to support
Routes<=2.2 and Routes==2.3.
Closes-Bug: #1563028
Change-Id: I655bfe7f047945896d63dd94c584acfe60d81b38