I think wrong service name was there because of copy/paste from iscsi-server module.
service:iscsitarget is from package 'iscsitarget' containing tools for  iscsi-server,  not iscsi-lio-server. YaST iscsi-server is dropped for SLES12. Package 'lio-utils' on SLES12 contains /etc/sysconfig/SuSEfirewall2.d/services/target. This file was missing on SLES11 SP3, added by maintenance request (bnc #850076).
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