Updated openstack/openstack
Project: openstack-dev/devstack  d7e38ebd057219fdf55e69b63c9b929e629b8e74
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Remove provider router configuration

To be compatible with the Icehouse release of MidoNet, the
provider router configuration is removed from devstack since
it is no longer necessary to configure it.

Change-Id: I4be2d9bbf2c82fd375702cbb1d60c3277086134f
Implements: blueprint remove-provider-router-config-for-midonet