Routes should be just imported, not mounted

[OndraM]

It just causes me headache to figure out why the routes behave so weirdly even if you follow the cookbook 1:1 :-).

When calling mount() on already imported routes (what is stated in the cookbook), the router behaves a bit weirdly and mounts the routes in this way:

-------------------------- -------- -------- ------ --------------------------------------------- 
  Name                       Method   Scheme   Host   Path                                         
 -------------------------- -------- -------- ------ --------------------------------------------- 
  _wdt                       ANY      ANY      ANY    /_wdt/_wdt/{token}                           
  _profiler_home             ANY      ANY      ANY    /_profiler/_profiler/                        
  _profiler_search           ANY      ANY      ANY    /_profiler/_profiler/search                  
  _profiler_search_bar       ANY      ANY      ANY    /_profiler/_profiler/search_bar              
...

Basically the prefixes are doubled, what is definitely not intended. While the behavior of the RouteCollectionBuilder is kinda weird, I rather think this is a just misuse of the mount() method - which is not needed and is probably not expected to be called on already imported and mounted routes.

Moreover, the import of annotation routes works just by coincidence - the second parameter of import() is prefix, not type, so the routes are added with prefix "/annotation" and only because the mount is used, they appears as mounted to "/" prefix.

Cc @weaverryan

[stof]

the doc is wrong because it was written based on an earlier version of the RouteCollectionBuilder which was not auto-mounting routes when importing them

[wouterj]

Hi @OndraM! It looks like your completely correct here. I'm sorry we didn't do anything with this PR. I rebased your commit and created #6708. You'll still get all credits.

Thanks!