ctdb-ipalloc: Don't consider runstates in the IP takeover code

ctdb-ipalloc: Don't consider runstates in the IP takeover code

Checking runstates is unnecessary now that nodes that are not RUNNING
will return no available IP addresses.  I have no idea why I didn't do
it this way originally.

Tweak the test code to cope with this.

Note that this is a backward-incompatible change.  If new and old
versions of CTDB are running together in a cluster and a new node
takes over as recovery master then old nodes will be able to host
public IP addresses before they are in RUNNING runstate.  This is
mitigated by the bias towards recovery master stability in elections.
If it is important that nodes do not host IPs until they are RUNNING
then do not restart nodes running the old version.

Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>