Empty connection pool after test_kombu.
Empty connection pool after test_kombu.

Empty the connection pool after the tests in test_kombu have run.  This
ensures that there is nothing leftover that will affect tests of other
implementations that use nova.rpc.amqp (impl_qpid right now).

Change-Id: Ib023722f97a21821869369d0024cf61272267ea3

n0ano/gantt,n0ano/gantt