RM9285: Fix for upstream db change & py26 issue

* neutron commit 9bf0e6654480f98f2315a43687b267263a82a823 removed
helper methdods from neutron.db.api.
* py26 does not have dict comprehensions.
Limiting validate_gateway_excluded to gateway_ip only

RM9134
Merge pull request #215 from insequent/round_2_nexthop_and_gateway_ip

Limiting validate_gateway_excluded to gateway_ip only
RM8615

Implements a redis client for publishing security group rules for ports
connected to briged networks.
RM9305

Fixes cases where we may accidentally leak resources owned by other
tenants through Nova.
RM9305

Fixes cases where we may accidentally leak resources owned by other
tenants through Nova.
Merge pull request #216 from asadoughi/master

RM9285: Fix for upstream db change & py26 issue
Merge pull request #217 from Cerberus98/rm8615

RM8615
Added oslo.middleware to requirements

Neutron doesn't have it in their requirements for some raisin.

RM8775
Merge pull request #218 from roaet/add_oslo_middleware

Added oslo.middleware to requirements
Merge pull request #219 from Cerberus98/rm9305

RM9305
Merge pull request #220 from Cerberus98/rm9305

RM9305