Optional org_admin

stuff.rb

## user within a shared context
  let(:options) { opts || {} }
  let(:access) { options[:access] || {} }
  let(:role) { options.fetch(:role, "standard") }
  let(:org_admin) { options.fetch(:org_admin, false) }

  let!(:membership) { current_user.account_memberships.create!(account: account, role: role, organization_administrator: access[:org_admin]) }


## shared context in spec
  context "as an admin insight core user" do
    include_context "insight core user", role: :power, org_admin: :true
    include_examples "can invite new account members"
  end