Use wicked as dhcp client in instsys. bnc#865707
Updated changelog
Fix
actually call delete_config before reactivating
inactive_config? renamed to active_config? and fixed

formerly the method was confused about whether it wanted to return a
boolean about one card or a list of string names (the inactive cards)
Merge branch 'master' into bnc865707-wicked-dhcp

used "git merge master --no-commit -X ours" and cleaned up manually
Merge pull request #166 from yast/bnc865707-wicked-dhcp

Use wicked as dhcp client in instsys. bnc#865707  bnc#866617