core:Unable to restore DB when selinux is disabled.

Change script to manipulate files by chcon only when SELinux is not in
the Disabled mode.

Change-Id: I76ca818acf53759eae2576302e4ca19ab3988103
Signed-off-by: Eli Mesika <emesika@redhat.com>
Bug-Url: https://bugzilla.redhat.com/show_bug.cgi?id=980042