systemd-presets-branding-openSUSE: Enable iscsi daemon socket and iscsi service

This udpate fixes the following issue with systemd-presets-branding-openSUSE:
- bnc#853300: Enable iscsi daemon socket and iscsi service as installed, so that iscsid.service can be socket-activated.

Fixed bugs
bnc#853300
yast2 iscsi-client can not automatically login
Selected Binaries
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