When trying to get aaa-mode, use cafile if given
When trying to get aaa-mode, use cafile if given

Fix for certificate verify errors during quota queries. If cafile is specified,
use it for verification else set verify to False in the request query.

Closes-Jira-Bug: JCB-218790
Change-Id: I43718b4d1b8c6bc145932108ea8cb5a97d00d2d9

Juniper/contrail-neutron-plugin