Removed firewall_stage1 from AutoYast in confirm-mode

- firewall_stage1 does not import the firewall and services-manager
  settings because that is done in second stage by other clients
- bnc#894130
Changes and version
Merge pull request #37 from kobliha/no-1st-fw-config-in-autoyast

Removed firewall_stage1 from AutoYast in confirm-mode