OS Plugin Non-Standard Neutron Attributes

Issue raised by c689:

When we create a network using the openstack plugin v3, we see that kwargs are not configured anymore (as they were with openstack plugin v2).

Logs for creation with OSPv3 plugin:
2019-09-05 13:00:46.085 LOG <test_ext_netw_ospv3> [network_u9c2m0.create] DEBUG: Attempting to create network with these args: {u'router:external': True, u'name': u'test_network', u'admin_state_up': True, u'tenant_id': u'77c0dff409f44af2a4e772b126447ceb', u'apic:distinguished_names': {u'ExternalNetwork': u'uni/tn-prj_77c0dff409f44af2a4e772b126447ceb/out-l3out_test_n/instP-EPG_l3out_test_n'}, u'apic:nat_type': u'', u'port_security_enabled': True, u'project_id': u'77c0dff409f44af2a4e772b126447ceb'}
2019-09-05 13:00:47.502 LOG <test_ext_netw_ospv3> [network_u9c2m0.create] DEBUG: Created network with this result: openstack.network.v2.network.Network(providerhysical_network=physnet1, ipv6_address_scope=None, revision_number=4, port_security_enabled=True, provider:network_type=opflex, id=7e0b15ef-a11f-468a-a4da-31fc75d5661b, router:external=True, availability_zone_hints=[], availability_zones=[], location=Munch({'project': Munch({'domain_id': None, 'id': u'77c0dff409f44af2a4e772b126447ceb', 'name': 'l2ext_test', 'domain_name': 'Default'}), 'zone': None, 'region_name': u'regionOne', 'cloud': 'defaults'}), ipv4_address_scope=None, shared=False, project_id=77c0dff409f44af2a4e772b126447ceb, status=ACTIVE, subnets=[], description=, tags=[], updated_at=2019-09-05T11:00:46Z, is_default=False, provider:segmentation_id=None, name=test_network, admin_state_up=True, created_at=2019-09-05T11:00:46Z, mtu=1500)
2019-09-05 13:00:48.215 CFY <test_ext_netw_ospv3> [network_u9c2m0.create] Task succeeded 'openstack_plugin.resources.network.network.create'

But "apic" configuration is not executed/handled.

Logs for creation in OSPv2:
(and the "apic" configuration is properly done)

2019-07-04 09:57:16.944 LOG <pxs_vm_n_mgmt_uqfwzs> [network_1ywtw5.create] DEBUG: REQ: curl -g -i --cacert "/etc/cloudify/[REDACTED].pem" -X POST https://[REDACTED]:13696/v2.0/networks -H "Accept: application/json" -H "Content-Type: application/json" -H "User-Agent: python-neutronclient" -H "X-Auth-Token: {SHA1}aafcdb0293439fff6584e632902de933b0b888a4" -d '{"network": {"router:external": true, "apic:nat_type": "", "tenant_id": "6cbbb48f42e74cf9957d50f0ad0f7180", "name": "pxs_vm_n_mgmt", "admin_state_up": true, "port_security_enabled": true, "apic:distinguished_names": {"ExternalNetwork": "uni/tn-prj_6cbbb48f42e74cf9957d50f0ad0f7180/out-pxs_vm_mgmt/instP-EPG_pxs_vm_mgmt"}}}'
2019-07-04 09:57:18.062 LOG <pxs_vm_n_mgmt_uqfwzs> [network_1ywtw5.create] DEBUG: RESP BODY: {"network": {"apic:bgp_enable": false, "apic:bgp_asn": "0", "providerhysical_network": "physnet1", "apic:distinguished_names": {"ExternalNetwork": "uni/tn-prj_6cbbb48f42e74cf9957d50f0ad0f7180/out-pxs_vm_mgmt/instP-EPG_pxs_vm_mgmt", "VRF": "uni/tn-prj_6cbbb48f42e74cf9957d50f0ad0f7180/ctx-pxs_vm_mgmt", "EndpointGroup": "uni/tn-prj_6cbbb48f42e74cf9957d50f0ad0f7180/ap-OpenStack/epg-EXT-pxs_vm_mgmt", "BridgeDomain": "uni/tn-prj_6cbbb48f42e74cf9957d50f0ad0f7180/BD-EXT-pxs_vm_mgmt"}, "ipv6_address_scope": null, "revision_number": 4, "port_security_enabled": true, "mtu": 1500, "apic:bgp_type": "default_export", "id": "559bb3ae-3599-4d07-9d6f-7fb5f6162acf", "description": "", "router:external": true, "availability_zone_hints": [], "availability_zones": [], "ipv4_address_scope": null, "shared": false, "project_id": "6cbbb48f42e74cf9957d50f0ad0f7180", "status": "ACTIVE", "subnets": [], "apic:synchronization_state": "synced", "tags": [], "updated_at": "2019-07-04T07:57:17Z", "is_default": false, "apic:nat_type": "", "provider:segmentation_id": null, "name": "pxs_vm_n_mgmt", "admin_state_up": true, "tenant_id": "6cbbb48f42e74cf9957d50f0ad0f7180", "created_at": "2019-07-04T07:57:17Z", "provider:network_type": "opflex", "apic:external_cidrs": ["0.0.0.0/0"], "apic:svi": false}}