utils: osinfo: do not use absolute paths

Project should always used build time customization for all paths. This
enables working at devenv mode and at different distributions and
settings.

Related-To: https://bugzilla.redhat.com/show_bug.cgi?id=1043206
Change-Id: I51be14104b73214602c491383fde6b34ef4f094c
Signed-off-by: Alon Bar-Lev <alonbl@redhat.com>
packaging: osinfo: move sysprep defaults out of /etc

when moved to using conf.d structure, there is no reason why storing
sysprep files in /etc as user can install his own osinfo config and
overwrite product defaults reference with his own.

this simplifies pushing product changes without the rpmsave/rpmnew hell
and enables support to understand site customization.

upgrade is comparing current install sysprep files and keep these that
are different from product default at existing location, creating osinfo
configuration for these.

the move to osinfo neglected the ability of user to specify different
setting for sysprep in database, we also fix that.

Bug-Url: https://bugzilla.redhat.com/show_bug.cgi?id=1043206
Change-Id: I26a853c12ca091f340d6ebed2c10726462ec576a
Signed-off-by: Alon Bar-Lev <alonbl@redhat.com>