Event handlers should use raw_power_state= for vms

Now that VmOrTemplate#state= has been removed, event handler definitions should
set the raw_power_state directly.

https://bugzilla.redhat.com/show_bug.cgi?id=1115546
https://bugzilla.redhat.com/show_bug.cgi?id=1115557
Simplify VmOrTemplate#state

Now that the power_state is calculated correctly for different types of Vms Or
Templates, the VmOrTemplate#state method can be a little simpler.

https://bugzilla.redhat.com/show_bug.cgi?id=1115546
https://bugzilla.redhat.com/show_bug.cgi?id=1115557
Specs: Automate specs should set raw_power_state=

Several automate specs were still setting VmOrTemplate#state= instead of
VmOrTemplate#raw_power_state=.

Now that VmOrTemplate#state= is removed, these tests need to be updated.

https://bugzilla.redhat.com/show_bug.cgi?id=1115546
https://bugzilla.redhat.com/show_bug.cgi?id=1115557