recoverd: Interface reference count changes should not cause takeover runs

recoverd: Interface reference count changes should not cause takeover runs

At the moment a naive compare of the all the interface data is done.
So, if any IPs move then the reference counts for the the relevant
interfaces change, interfaces appear to have changed and another
takeover run is initiated by each node that took/released IPs.

This change stops the spurious takeover runs by changing the interface
comparison to ignore the reference counts.

Signed-off-by: Martin Schwenke <martin@meltin.net>
(This used to be ctdb commit 0b7257642f62ebd83c05b6e2922f0dc2737f175c)