Add support mounted rack app for rails and hanami

[AlexeyMatskevich]

I noticed that in cases where a rack application is mounted to main application, like pure rack or roda, in these cases for both hanami and rails, the routing recognition does not work correctly.

My suggestion in such cases is to use rack extractor instead of the main extractor for the framework.

[AlexeyMatskevich]

It looks like the tests are crashing because of the difference in generation in spec/rspec/rails_spec.rb and spec/minitest/rails_spec.rb.
I don't see what the difference is yet.

new_yaml["paths"].keys
=> 
["/additional_properties",
 "/images",
 "/images/upload",
 "/images/upload_multiple",
 "/images/upload_multiple_nested",
 "/images/upload_nested",
 "/images/{id}",
 "/my_engine/eng_route",
 "/my_engine/test",
 "/rack/bar",
 "/rack/foo",
 "/secret_items",
 "/tables",
...

it looks like the sort order of paths is broken

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 97.12%. Comparing base (7d16147) to head (6a1094d).
Report is 5 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #213      +/-   ##
==========================================
- Coverage   97.22%   97.12%   -0.10%     
==========================================
  Files          20       20              
  Lines         612      626      +14     
  Branches      133      143      +10     
==========================================
+ Hits          595      608      +13     
- Misses         17       18       +1     

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[exoego]

Thanks.
I fixed rails_test.rb for minitest.