packaging: setup: suppress logging of VM password

Also use LOG_FILTER_KEYS for other cases, so that we can do that
right at the beginning.

Bug-Url: https://bugzilla.redhat.com/1096838
Change-Id: I92ef0a1516d7a6dd70d3fd53ceac3c71ce1eaf24
Signed-off-by: Yedidyah Bar David <didi@redhat.com>