Add support for allow_pagination and allow_sorting

Neutron has boolean parameters for enabling/disabling pagination and
sorting on the server side. This patch adds the ability to configure
these parameters via the neutron class.

Change-Id: Ibf105b828e1ca504f8f6b5292b8ad0335c658d6d
Configure security group when using ML2 plugin

Since the ML2 plugin can concurrently support different L2 agents (or
other mechanisms) with different configurations, Neutron developpers recommend
setting firewall_driver flag in ml2 configuration.

Change-Id: I62d0d1b2aac88a11e5f3e80e98953c71cfc98629
Closes-bug: #1262678
Signed-off-by: Emilien Macchi <emilien.macchi@enovance.com>
Merge "Add support for allow_pagination and allow_sorting"