* Do not "reset" taint states to match partitions after OS load.
Encumber node with any additional taint states found across the
OSes loaded on a node's partitions (union of states). Change the
name of the associated Node object method to better represent the
* Clear all taint states when a node exits "reloading"
When the reload_daemon is finished with a node and ready to release it,
it will now clear any/all taint states set on the node. This is the
only automatic way to have a node's taint states cleared. Users
cannot clear node taint states by os_load'ing away all tainted
partitions after this commit; nodes must travel through reloading
to get cleared.