[zmq] Remove unnecessary rpc_zmq_port option

[Oleksii Zamiatin]

Remove unnecessary rpc_zmq_port option from zmq driver, because zmq driver doesn't use static port any more - dynamic port binding is used for running servers.

[Alexey Yelistratov (ayelistratov-deactivatedaccount)]

https://review.openstack.org/#/c/230121/

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/230121
Committed: https://git.openstack.org/cgit/openstack/oslo.messaging/commit/?id=74871e0860a3094d0792a077316d3e41aec1c5c3
Submitter: Jenkins
Branch: master

commit 74871e0860a3094d0792a077316d3e41aec1c5c3
Author: Alexi Yelistratov <email address hidden>
Date: Thu Oct 1 23:16:32 2015 +0300

    Remove unnecessary rpc_zmq_port option

    Remove unnecessary rpc_zmq_port option from zmq driver, because zmq
    driver doesn't use static port any more - dynamic port binding is used
    for running servers.

    Closes-Bug: #1497277
    Change-Id: I91e978347dd364b2d4c00bc223b0e3ecface7c43