node.conf: correct IP_ADDRESS_WRAPAROUND_OFFSET param

https://bugzilla.redhat.com/show_bug.cgi?id=1150186
Bug 1150186 - node.conf incorrectly indicates
WRAPAROUND_IP_ADDRESS_OFFSET

The default node.conf had a long section explaining what
IP_ADDRESS_WRAPAROUND_OFFSET is for and then provided
WRAPAROUND_IP_ADDRESS_OFFSET. The actual container looks at
IP_ADDRESS_WRAPAROUND_OFFSET. Correct node.conf.