Allow multiple before_each block

[qcam]

Hi forks,

Currently if I stub first_method and second_method in different before_each blocks, only the second_method got stubbed.

describe "GET /users/me' do
  it 'returns user information" do
    Grape::Endpoint.before_each do |endpoint|
      allow(endpoint).to receive(:authenticate_user!).and_return(true)
    end

    Grape::Endpoint.before_each do |endpoint|
      allow(endpoint).to receive(:user).and_return(someone)
    end

    get '/users/me'
  end
end

Can Grape support this? I have added some code as well as tests.

[dblock]

The change looks good. Please update CHANGELOG and squash your commits.

[qcam]

@dblock thanks, CHANGELOG updated and commits squashed as per your request. 😄

[dblock]

Missing space before -. Nitpick :)

[dblock]

Merged via ab2f0dc. Thanks!

[qcam]

Great! Thanks!