open-iscsi: updated mkinitrd setup script to not scan fstab

This update fixes the following issue with open-iscsi:
- bnc#826700: updated mkinitrd setup script to not scan fstab, updated changes file, and updated embedded changes file as well

Fixed bugs
bnc#826700
mkinitrd with manual iSCSI drive connected puts unneeded iscsi and tg3 modules in initrd rendering system unbootable
Selected Binaries
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