The "kolla_internal_address" variable is not documented or defined
anywhere. When "kolla_internal_vip_address" is undefined, the error
message is about "kolla_internal_address", which will confuse operators.
This change deprecates "kolla_internal_address", and adds a default
value for "kolla_internal_vip_address" when "kolla_internal_address" is
undefined.
Change-Id: I09694b38420ea67896bb8cf4ffd7ce6f131af10e
Closes-Bug: #1864206