Updated openstack/openstack
Project: openstack/oslo.utils  46d61c428b6e4c8f4e845eda7b2b884c28291c3f

Add ip address validation

There are many projects on OpenStack that use
ip validation. It would be nice to have function
for validation in common module.

Change-Id: Ia723490a02b1816fe96c3a02e069d57f4d97d940