Mixed case hostnames causing pcs failures

Issue

Mixed case hostnames have caused issues with some pcs commands

$ pcs cluster auth -u hacluster DB1 DB2
Password: 
db1: Authorized 
db2: Authorized

The above pcs cluster auth has completed successfully, but note that the response has the hostnames changed to lowercase.

Running the pcs cluster setup command with the same uppercase hostnames fails:

$ pcs cluster setup --name clus DB1 DB2
Error: DB1: unable to authenticate to node
Error: DB2: unable to authenticate to node
Error: nodes availability check failed, use --force to override. WARNING: This will destroy existing cluster on the nodes.