Previously, the return list from get_ip_address in
trove.instance.views was not filtering by the CONF.ip_regex.
(See blueprint add-ip-addr-filter-to-instance-view for more
information). DNS uses this method to get the IP. Therefore
it was not creating record with the right IP. Moving the filtering
logic to the get_ip_address method will ensure that both DNS and
instance view will obtain the right IP.
Change-Id: I4ce7c65e24f6d105f555e6c36d788558daa25f12
Closes-Bug: #1260089
ad6e39bac5