Fix value error during configuring installation.device.custom into "/dev/sda,/dev/sdb".

Change-Id: I4a98405dfe27445d17b002e744a8ca2e50660174
Bug-Url: https://bugzilla.redhat.com/show_bug.cgi?id=1078608
Signed-off-by: hadong <hadong@redhat.com>
Signed-off-by: Fabian Deutsc <fdeutsch@redhat.com>
selinux: More additional rules for el7

Change-Id: I01d0eee4706155911dbfaecf247b5ec767989e6c
Signed-off-by: Fabian Deutsch <fabiand@fedoraproject.org>