vdsm: fix dmidecode parsing

There is a version of dmidecode reported print #-prefixed comments, this
patch discards these lines.

Bug-Url: https://bugzilla.redhat.com/show_bug.cgi?id=1109342
Change-Id: I50493c5f77f59c5bdceac2a6e8223e8ccae75b09
Signed-off-by: Dima Kuznetsov <dkuznets@redhat.com>
vdsmhooks: fix package installation

Change-Id: Ibaad04786feb92c6ce94058e48ecb8d264b42975
Signed-off-by: Alon Bar-Lev <alonbl@redhat.com>
vdsmhooks: engage packages at earlier state

Change-Id: Id235935239a6f2e80cb34da3a1530b8ae63e66df
Signed-off-by: Alon Bar-Lev <alonbl@redhat.com>