Improve logging in _update_internal_gateway_port_ip

Change-Id: I820216445b31bf3e5e26e3d9345753b443c2d181
Signed-off-by: Doug Hellmann <doug.hellmann@dreamhost.com>
Fix bad log msg argument

Change-Id: I4bd0510385df0ba369b931979f48b29bf5c978c7
Signed-off-by: Doug Hellmann <doug.hellmann@dreamhost.com>
Merge pull request #14 from dhellmann/improve-error-message

Improve logging in _update_internal_gateway_port_ip