config : Replace hdparm by blockdev to reread the partitions table

There is blockdev which is installed with util-linux and partprobe installed with parted.
We don't need to use hdparm to reread the partitions table.

So i replaced :

  # hdparm -z /dev/sda

By :

  # blockdev --rereadpt /dev/sda
base.install : removed the hdparm package

As we replaced hdparm by blockdev in the *.configure files
we don't need this dep anymire in the base profile.
pxe.install : add the hdparm package

The hdparm dep has been removed from the base profile but pxe profile
need to have this dep due to a hdparm -t command in the diskinfo.py file.
health-check.install : add the hdparm package

The hdparm dep has been removed from the base profile but health-check
profile need to have this dep.
Merge branch 'blockdev_instead_hdparm' of https://github.com/goldyfruit/edeploy into blockdev_instead_hdparm