sysconfig: Collective update

This update fixes the following issues for sysconfig:
- 763533: Fixed ifrenew-dhcp to use built-in dhcpcd --renew
- 724775: added tests to the 77-network.rules file if the /sbin/ifup and /etc/sysconfig/network/scripts/ifup-sysctl exit

Fixed bugs
bnc#724775
initramfs and ifup-sysctl
bnc#763533
running ifrenew breaks network configuration
Selected Binaries
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