Test suite - try to make addip test more reliable and add some debugging.

Test suite - try to make addip test more reliable and add some debugging.

This test is failing in some situations.  The "ctdb addip" command
works but the IP never appears in the "ctdb ip" output.

Try restricting the last octet to be between 101-199.  At the moment
addresses like 10.0.2.1 are being chosen and these are often the
address of the host machine in autocluster configurations... so might
cause weirdness.

Also add some debugging if checking for the IP address times out.

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