eventscripts: Separate out RPC service restart code

eventscripts: Separate out RPC service restart code

While doing this:

* Explicitly assign RPC program and version information in
  _nfs_check_rpc_common().  This is more lines of code but is easier
  to read.

* Don't print the options when starting a service.  Trying to print it
  makes the code messy for little benefit.

  Update the eventscript unit testing code and a Ganesha test to
  reflect this.

Signed-off-by: Martin Schwenke <martin@meltin.net>
(This used to be ctdb commit e8b531405665885196c95fe1608db33a255bf761)