SuSEfirewall2: honor FW_IPv6 setting also in debug mode

This update fixes the following issue for SuSEfirewall2:
- 769411: honor FW_IPv6 setting also in debug mode

Fixed bugs
bnc#769411
/sbin/SuSEfirewall2 debug emits ipv6 related rules even they has been disabled in /etc/sysconfig/SuSEfirewall2
Selected Binaries
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