Make tags a soft error
Make tags a soft error

Consider exclusion tags violations a soft error. While it
is not desirable to have to instances providing the same
service running on the same node, this is still better
than running on an offline node.

Signed-off-by: Klaus Aehlig <4ce51de36d9068cd7db2eec1151e0f3f95419008@google.com>
Reviewed-by: Aaron Karper <99cc1031546340b2b8ced5fe338b5890677a56ca@google.com>

mbakke/ganeti,yiannist/ganeti,yiannist/ganeti,apyrgio/ganeti,andir/ganeti,leshchevds/ganeti,mbakke/ganeti,dimara/ganeti,bitemyapp/ganeti,dimara/ganeti,onponomarev/ganeti,andir/ganeti,onponomarev/ganeti,apyrgio/ganeti,bitemyapp/ganeti,ganeti/ganeti,grnet/snf-ganeti,ganeti/ganeti,grnet/snf-ganeti,yiannist/ganeti,andir/ganeti,mbakke/ganeti,leshchevds/ganeti,ganeti/ganeti,leshchevds/ganeti