ctdb tool - remove verify_node() function

ctdb tool - remove verify_node() function

parse_nodestring() checks what this used to check.  parse_nodestring()
already has the nodemap.

It was a 50-50 decision to decide whether to update verify_node() to
check against a nodemap that is passed in or to delete it.

Signed-off-by: Martin Schwenke <martin@meltin.net>
Conflicts:

	tools/ctdb.c

Signed-off-by: Martin Schwenke <martin@meltin.net>
(This used to be ctdb commit 2c1baf5ddd3c2cdd2a3f98b8e208d3a48530d1d1)