Don't use ip_address_uri it has [] wrapped if IPv6
Don't use ip_address_uri it has [] wrapped if IPv6

When getting the external VIP for Certificate creation
in OSP17 the Public VIP is fetched from the VipPortMap.
The 'ip_address_uri' value will have IPv6 addresses wrapped
in brackets, instead use the 'ip_address' value.

Attempt to solve SSL error:
  SSLError: CertificateError: hostname 'ipv6_addr' doesn't match '[ipv6_addr]'

Related rhbz#2010248

Change-Id: I8b57833e10618888d0a36a4f3548f2f46a424ebd

redhat-openstack/infrared,redhat-openstack/infrared,redhat-openstack/infrared