Use msgserver_fqdn rather than msgserver_hostname in all templates
Fix deprecation of mcollective_cluster_members

Gravitate towards msgserver_cluster_members parameter, which is internally used as
real_msgserver_cluster_members.

If both are set and they don't match then fail.
If one is set use that.
If neither are set then fail.
Merge pull request #359 from sdodson/fix_msgserver

Use msgserver_fqdn and fix mcollective_cluster_members deprecation