Ronelle Landy 9853d3608f Default private_ipv4 to use public_ipv4 address when null
The static zuul driver returns only a public_ipv4 address for
nodes in use. The multinode bridge role accesses the node
private_ipv4 address. As such, when the private address is
empty/null the role fails.

This review defaults that private address so that the role
uses the public address when the private address is null.

Change-Id: I32fb17bae98f13f735da4d5b9a6a01e948f21678
2019-01-23 10:30:20 +01:00
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