raise sg exceptions
Exception for SecurityGroupRuleNotFound
Merge pull request #23 from Juniper/ext_sg_exception

Ext sg exception
FloatingIp exception during show
    Performance improvements in neutron for mainly list operations. Changes include
     * doing api-server list with detail=True since neutron representation in list is
       with detailed information
     * doing lists with anchors of back-ref-ids
     * doing list/read with fields=[<back-ref-types>] that will be needed
     * restricting scope to context.tenant in case of non-admin user
     * returning back fixed-ip-address in floating ip read
Performance improvements in neutron - fix some issues - praneet
Performance improvements in neutron - fix some issues
Merge pull request #25 from Juniper/floating_ip_show_exception

FloatingIp exception during show
Merge pull request #27 from Juniper/praneet_ajay_perf

Praneet ajay perf