pxe.install: Print where the initrd got built

Once the build process is done, let's print where the file is.
That's useful when using eDeploy for a first time
Merge branch 'master' of github.com:enovance/edeploy
sm2026: Let's clean disks before usage

Let's insure that kernel doesn't lock the device. So let's remove the
disk from any lvm it was member of before, clean the disk's partition
and rescan for the new one.

That should do the job of cleaning disks before usage