Don't use @real_password in login_spec.rb
Don't use @real_password in login_spec.rb

This instance variable went with login_manual.rb in ad15254. We don't
actually need the real password to test this effect, so use a plain string.

gds-operations/vcloud-core,gds-operations/vcloud-core,UKHomeOffice/vcloud-core,UKHomeOffice/vcloud-core