core: refactor failure to run vm flow - part 3

Rename RunVmCommandBase#failToRunVm with runningFailed, and put other
things that should always be executed when the async command fails so
this method will be equivalent of RunVmCommandBase#runningSucceeded in
case of a failure.

Change-Id: I1e24011ea31e504439614bf2876cf81a47d3d3c1
Signed-off-by: Arik Hadas <ahadas@redhat.com>