With local daemons the sockets are now numbered starting from 0. Fix

With local daemons the sockets are now numbered starting from 0.  Fix
setup of local daemons so that it correctly assigns no public IPs to a
single node each time.  Separate out daemon_setup so that the
selection of the node with no public IPs is only done once at the
beginning of testing.  Clean up all current tests, mostly with a view
to ensuring that a node selected for testing some kind of failover
actually has public addresses assigned.  Reenabled 01_ctdb_version.sh
- it now passes if rpm doesn't do anything useful on the node.

Signed-off-by: Martin Schwenke <martin@meltin.net>
(This used to be ctdb commit 86807e8b7b179cbe87e559fb3b1f02c8b1990dc4)