Documentation: Clarify state overridden behavior for dcnm_interface module

[mikewiebe]

When using state: overridden ensure the following behavior is clearly documented.

• When config: [] is empty all interfaces across all devices in the fabric will be defaulted or deleted
• When config: is NOT empty interfaces will only be defaulted or deleted if another interface on that device is being managed.

Example 1:

This will default or remove all interfaces on all fabric devices

    - name: Remove Unmanaged Fabric Interfaces in Nexus Dashboard
      cisco.dcnm.dcnm_interface:
        fabric: nac-msd-fabric1
        state: overridden
        deploy: false
        config: []

Example 2:

This will default or remove all interfaces on 10.15.34.13 only except Ethernet1/11. All other interfaces on other devices remain untouched.

    - name: Remove Unmanaged Fabric Interfaces in Nexus Dashboard
      cisco.dcnm.dcnm_interface:
        fabric: nac-msd-fabric1
        state: overridden
        deploy: false
        config:
          -   deploy: false
              name: Ethernet1/11
              profile:
                  admin_state: false
                  allowed_vlans: none
                  bpdu_guard: false
                  cmds: ''
                  description: PC11 Member Interface 1/11 Latest
                  duplex: auto
                  mode: trunk
                  mtu: default
                  native_vlan: ''
                  port_type_fast: false
                  speed: auto
              switch:
              - 10.15.34.13
              type: eth