Renamed host capabilities from opensuse to suse
Fixed class naming and detection for suse hosts
Fixed suse naming for fcengine cap and refined install command
Fixed suse spelling in fedora capability
Fixed and extended suse guest capabilities

In order to get a SUSE guest running and installing fine i have added a
correct capability for installing rsync and nfs-client.

I have included SUSE naming fixes as well because SUSe doesnt get
spelled SuSE anymore :).
Added a nonsudo command for nfsd check
Added better check if nfs server is available on SUSE hosts
Merge pull request #4492 from tboerger/feature/suse-fixes

SUSE naming and capability fixes