Fix: params is not the same in RESTful APIs with different verbs

[khiav223577]

Currently I have two APIs with same route but different parameters.
It will generate wrong documents in this case. The parameter is duplicate and should not be listed in GET /admin/laboratories API. See my test cases and screenshot below:

route '/admin/laboratories', 'Laboratory List' do
  get 'Get Labs' do
    it do
      # ...
    end
  end
end

route '/admin/laboratories', 'Laboratory List' do
  post 'Create New Lab' do
    parameter :name, with_example: true, required: true
    parameter :products, with_example: true, required: true

    it do
      # ...
    end
  end
end

This PR will fix the problem.