Add failing test

Signed-off-by: Daniel Bøndergaard <danielboendergaard@gmail.com>
Fix nested route group namespaces

Signed-off-by: Daniel Bøndergaard <danielboendergaard@gmail.com>
Merge pull request #4468 from danielboendergaard/routing-group-fix

Bugfix for nested route groups using namespaces
Merge branch '4.1' into 4.2
Merge branch '4.2' of github.com:laravel/framework into 4.2