Fix port_id filter not honored

Add dict. to map API params to DB columns

Change-Id: I5f10eea77533e91afeb690e39301d7282e1b1620
Fixes: bug #1169706
Add RabbitMQ and QPID HA support flags to quantum.conf

Since Quantum supports HA queues with RabbitMQ (https://review.openstack.org/#/c/13760/),
quantum.conf should provide new flags for explain how to configure multiple RabbitMQ servers and enable HA.

New flags :
rabbit_hosts=$rabbit_host:$rabbit_port
rabbit_ha_queues=false
qpid_hosts = localhost:5672

Fix Bug #1160369
Cherry-picked from https://review.openstack.org/#/c/25389/

Change-Id: I35903b1b7b66fde8d70ac7e8076e0def2a1f2d04
Merge "Fix port_id filter not honored" into stable/grizzly
Requiring '==' is rarely the right thing to do.