Adding/using default subnet pools to configuration

[Mohammad Banikazemi]

Currently we expect to receive the default subnet pools through environment variables only as indicated in controllers.py:

# TODO(tfukushima): Retrieve the following subnet names from the config file.
SUBNET_POOLS_V4 = [
    p.strip() for p in os.environ.get('SUBNET_POOLS_V4', 'kuryr').split(',')]
SUBNET_POOLS_V6 = [
    p.strip() for p in os.environ.get('SUBNET_POOLS_V6', 'kuryr6').split(',')]

[Abhishek Raut (abhraut)]

Subnetpool names to be provided by config only or they are to be set by environment variables if not provided in config?

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/330471

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/330471
Committed: https://git.openstack.org/cgit/openstack/kuryr/commit/?id=54448b0175561f5538881e52dd4f533c322df923
Submitter: Jenkins
Branch: master

commit 54448b0175561f5538881e52dd4f533c322df923
Author: vikaschoudhary16 <email address hidden>
Date: Thu Jun 16 16:36:59 2016 +0530

    Add default subnetpools to configuration

    Currently default subnetpools expected to be configured
    using environment variables. This is being moved to configuration
    file.

    Change-Id: I15562a0e479ff847b764e18eb286dc3565188a64
    Closes-bug: #1542026