RSpec shared context "with current_organization setting" does not work with Grape API

In !143978 (merged), a Rspec shared context was introduced that would set the Current.organization attribute to an organization. This allows us to have code like:

RSpec.describe Something do
  it 'uses current organization', :with_current_organization do 
    expect(described_class.organization).to eq(current_organization)
  end
end

This works fine for Rails controllers. But not for specs that use Grape API.

Some findings:

• Current.reset is called three times when :with_current_organization context is used
• Current.reset is called only once (as expected) when :with_current_organization context is NOT used
• GET/POST does not matter
• A simple example that does not fail has been added to the comments.

Implementation

Mock Current.organization in this helper.