Description of problem:
Auto-attaching latest tools iso for untooled Windows VMs is a nice thing to do when doing a generic "start VM" action but it's quite misleading when it kicks in as a result of "Run Once" action with CD to attach leaved as unchecked - the VM configuration should literally match what is entered in "Run Once" dialog (and the tools CD should be enabled by default there)

Version-Release number of selected component (if applicable):
is20.2 / rhevm-backend-3.3.0-0.30.beta1.el6ev.noarch

How reproducible:
always

Steps to Reproduce:
1. have a Windows VM
2. go to Run Once dialog, expand Boot Options
3. check if "Attach CD" is checked or not
4. uncheck "Attache CD" if checked, hit OK
5. check if VM has CD attached (vdsm.log, libvirt xml, qemu cli, ...)

Actual results:
3. "Attach CD" is unchecked
5. CD is actually attached

Expected results:
3. "Attach CD" should be checked and latest tools (the ones that get attached automagically) should be checked
5. VM should start without CD attached

Additional info: