Remove OPENSTACK_QUANTUM_NETWORK from settings

[Akihiro Motoki]

OPENSTACK_QUANTUM_NETWORK was deprecated in Juno release (in bug 1377498).
We are in Liberty now and It is time to remove this parameter and we should use OPENSTACK_NEUTRON_NETWORK.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/177566

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/177566
Committed: https://git.openstack.org/cgit/openstack/horizon/commit/?id=e49d12d2771f394252de7f52dce2845caae0f1f1
Submitter: Jenkins
Branch: master

commit e49d12d2771f394252de7f52dce2845caae0f1f1
Author: Akihiro Motoki <email address hidden>
Date: Sun Apr 26 02:44:48 2015 +0900

    Remove deprecated OPENSTACK_QUANTUM_NETWORK

    OPENSTACK_QUANTUM_NETWORK was deprecated in Juno release.
    We are in Liberty now and it is time to remove this parameter
    and we should use OPENSTACK_NEUTRON_NETWORK.

    UpgradeImpact
    Change-Id: I2be1d11b69665d1eb15d39b95119d84537918533
    Closes-Bug: #1448503