Network to pull Instance IP from should be configurable

[Vipul Sabhaya]

Currently the Instance View pulls the ['instance']['ip'] from a fixed list of possible Networks on the Nova Instance. We should make this configurable for deployments that do not rely on just the Private Network.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/39516

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/39516
Committed: http://github.com/openstack/trove/commit/7e57dbddcd3ddd257ef8491de09544c5a24b691a
Submitter: Jenkins
Branch: master

commit 7e57dbddcd3ddd257ef8491de09544c5a24b691a
Author: Steve Leon <email address hidden>
Date: Wed Jul 31 09:12:32 2013 -0700

    Configurable network labels used for showing IPs in instance details

    The ip shown in the instance detail was hard coded to be obtained from
    a nova netwok label 'private' or 'usenet'. With this change, the labels
    is configurable based on a regex pattern.

    Fixes bug 1206303

    Change-Id: I73d896e6b85bdebe342a777219b9b60d6954f8b6