[Pacemaker] crm_resource enhancement requests

[Dominik Klein]

-W -r $groupid should not report "running" when the group is only 
partially running or say "partially running".

-M could check whether there is any node with a positive score for the 
resource before entering the -INFINITY constraint and refuse entering 
the migration constraint if there is no node we could migrate to.

-M -H $nodename should check whether $nodename has a score of -INFINITY 
or a failcount of INFINITY (which wouldnt allow $resource to run there 
even with the added constraint of score INFINITY) and refuse entering 
the migration constraint if any of that is true.

I wish I could implement this stuff myself, but unfortunately, I can't. 
I have some almost working but pretty hack-ish bash stuff as a 
workaround that my resource admins are supposed to work with some time 
soon, but it would be really helpful if the cluster came with these 
features.

Comments?

Regards
Dominik