packaging: setup: Do not log passwords

Most of the code already refrains from logging passwords.
This change also makes upgrade from legacy 3.2 code not log the db
password and also makes otopi not log db password and admin password
in dumpEnvironment even if set from an answer file etc.
Depends on http://gerrit.ovirt.org/19776 .

Bug-Url: https://bugzilla.redhat.com/1014115
Change-Id: I81c7371eaf930b3cc21861deb620c61891ad4d1f
Signed-off-by: Yedidyah Bar David <didi@redhat.com>