Fix tags operations for instances
Fix tags operations for instances

Reviewed-by: imsnah


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