Merge branch 'master' into anyhostname

Author: sjpb

README.md

@@ -20,7 +20,7 @@ Role Variables
   * `cluster_name`: Optional.  An override for the top-level definition `openhpc_cluster_name`.
   * `ram_mb`: Optional.  The physical RAM available in each server of this group ([slurm.conf](https://slurm.schedmd.com/slurm.conf.html) parameter `RealMemory`).
 
-  For each group (if used) or partition there must be an ansible inventory group `<cluster_name>-<group_name>`. All nodes in this inventory group will be added to the group/partition. Nodes may have arbitrary hostnames but these should be lowercase to avoid a mismatch between inventory and actual hostname.
+  For each group (if used) or partition there must be an ansible inventory group `<cluster_name>_<group_name>`. All nodes in this inventory group will be added to the group/partition. Nodes may have arbitrary hostnames but these should be lowercase to avoid a mismatch between inventory and actual hostname.
 
 * `default`: Optional.  A boolean flag for whether this partion is the default.  Valid settings are `YES` and `NO`.
 * `maxtime`: Optional.  A partition-specific time limit in hours, minutes and seconds ([slurm.conf](https://slurm.schedmd.com/slurm.conf.html) parameter `MaxTime`).  The default value is