Add opcode status constants/type
Add opcode status constants/type

This mirrors, again, the Ganeti constats, and are added for future use.

mbakke/ganeti,leshchevds/ganeti,grnet/snf-ganeti,ganeti/ganeti,bitemyapp/ganeti,ganeti/ganeti,onponomarev/ganeti,yiannist/ganeti,dimara/ganeti,ganeti-github-testing/ganeti-test-1,grnet/snf-ganeti,apyrgio/ganeti,apyrgio/snf-ganeti,leshchevds/ganeti,ganeti-github-testing/ganeti-test-1,leshchevds/ganeti,dimara/ganeti,apyrgio/snf-ganeti,yiannist/ganeti,ganeti/ganeti,andir/ganeti,onponomarev/ganeti,andir/ganeti,mbakke/ganeti,yiannist/ganeti,andir/ganeti,bitemyapp/ganeti,apyrgio/ganeti,mbakke/ganeti