Should only support one mgmt-ports

[Yan Xing'an]

Somebody may configure multi CP management: true, while tacker can only support one mgmt port.
the mgmt_url is used for mgmt_driver.

If multi mgmt ports is configured, the last mgmt port takes effect.

vnfd:
tosca_definitions_version: tosca_simple_profile_for_nfv_1_0_0

description: example

metadata:
  template_name: sample-tosca-vnfd

topology_template:
  node_templates:
    VDU1:
      type: tosca.nodes.nfv.VDU.Tacker
      properties:
        image: centos7
        flavor: centos
        availability_zone: nova
        mgmt_driver: noop

    CP11:
      type: tosca.nodes.nfv.CP.Tacker
      properties:
        management: true
        order: 0
        anti_spoofing_protection: false
      requirements:
        - virtualLink:
            node: VL11
        - virtualBinding:
            node: VDU1

    CP12:
      type: tosca.nodes.nfv.CP.Tacker
      properties:
        management: true
        order: 1
        anti_spoofing_protection: false
      requirements:
        - virtualLink:
            node: VL12
        - virtualBinding:
            node: VDU1

    VL11:
      type: tosca.nodes.nfv.VL
      properties:
        network_name: net-mgmt-v832
        vendor: Tacker

    VL12:
      type: tosca.nodes.nfv.VL
      properties:
        network_name: yxa-net1
        vendor: Tacker

[root@EXTENV-10-254-9-82 ~]# tacker vnf-list |grep multi
| 553ad18c-3d8d-4816-b3b4-ab29a4f920ab | vnf-test-multi-mgmt-ports | {"VDU1": "192.168.100.16"} | ACTIVE | 3c39294b-e5e8-43e7-b17c-e3fc31a89db6 | 2f82fde1-4892-4a57-8262-75b27dbb538c |