Extract user instance var to let(:user) clause

spec/models/chargeback_vm_spec.rb

@@ -761,23 +761,23 @@ def used_average_for(metric, hours_in_interval)
  end
 
  context "by owner" do
+ let(:user) { FactoryGirl.create(:user, :name => 'Test VM Owner', :userid => 'test_user') }
  before do
- @user = FactoryGirl.create(:user, :name => 'Test VM Owner', :userid => 'test_user')
- @vm1.update_attribute(:evm_owner, @user)
+ @vm1.update_attribute(:evm_owner, user)
 
  @options = {:interval_size => 4,
- :owner => @user.userid,
+ :owner => user.userid,
  :ext_options => {:tz => "Eastern Time (US & Canada)"},
  }
  end
 
  it "valid" do
- expect(subject.owner_name).to eq(@user.name)
+ expect(subject.owner_name).to eq(user.name)
  end
 
  it "not exist" do
- @user.delete
- expect { subject }.to raise_error(MiqException::Error, "Unable to find user '#{@user.userid}'")
+ user.delete
+ expect { subject }.to raise_error(MiqException::Error, "Unable to find user '#{user.userid}'")
  end
  end
  end