Add a network definition for use by the test framework.
Add a network definition for use by the test framework.

We had to change some IP ranges around to not interfere with the
default range that libvirt uses on virbr0.

crowbar/crowbar,dirkmueller/crowbar,rsalevsky/crowbar,rhafer/crowbar,dirkmueller/crowbar,MaximilianMeister/crowbar,MaximilianMeister/crowbar,nkrinner/crowbar,SUSE-Cloud/crowbar,tserong/crowbar,rhafer/crowbar,aplanas/crowbar,rhafer/crowbar,aspiers/crowbar,toabctl/crowbar,SUSE-Cloud/crowbar,mmnelemane/crowbar,aplanas/crowbar,aspiers/crowbar,tserong/crowbar,vwallfahrer/crowbar,rsalevsky/crowbar,mmnelemane/crowbar,nkrinner/crowbar,crowbar/crowbar,vwallfahrer/crowbar,toabctl/crowbar