Test suite: Make "ctdb ip" test backward compatible with older ctdb versions.

Test suite: Make "ctdb ip" test backward compatible with older ctdb versions.

Recent updates to the test meant that it only worked with the latest
ctdb versions.  This changes things so that we never bother matching
the machine readable header, just the actual data in the output.  It
also takes a slightly more liberal approach in massaging the human
readable output to ensure it matches the machine readable output.

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