[minigraph][dualtor] Support parsing soc_ip out of dpg

[lolyu]

Why I did it

To further support parse out soc_ipv4 and soc_ipv6 out of Dpg:

<DeviceDataPlaneInfo>
  <IPSecTunnels />
  <LoopbackIPInterfaces xmlns:a="http://schemas.datacontract.org/2004/07/Microsoft.Search.Autopilot.Evolution">
    <a:LoopbackIPInterface>
      <ElementType>LoopbackInterface</ElementType>
      <Name>HostIP</Name>
      <AttachTo>Loopback0</AttachTo>
      <a:Prefix xmlns:b="Microsoft.Search.Autopilot.NetMux">
        <b:IPPrefix>10.10.10.2/32</b:IPPrefix>
      </a:Prefix>
      <a:PrefixStr>10.10.10.2/32</a:PrefixStr>
    </a:LoopbackIPInterface>
    <a:LoopbackIPInterface>
      <ElementType>LoopbackInterface</ElementType>
      <Name>HostIP1</Name>
      <AttachTo>Loopback0</AttachTo>
      <a:Prefix xmlns:b="Microsoft.Search.Autopilot.NetMux">
        <b:IPPrefix>fe80::0002/128</b:IPPrefix>
      </a:Prefix>
      <a:PrefixStr>fe80::0002/128</a:PrefixStr>
    </a:LoopbackIPInterface>
    <a:LoopbackIPInterface>
      <ElementType>LoopbackInterface</ElementType>
      <Name>SoCHostIP0</Name>
      <AttachTo>server2SOC</AttachTo>
      <a:Prefix xmlns:b="Microsoft.Search.Autopilot.NetMux">
        <b:IPPrefix>10.10.10.3/32</b:IPPrefix>
      </a:Prefix>
      <a:PrefixStr>10.10.10.3/32</a:PrefixStr>
    </a:LoopbackIPInterface>
    <a:LoopbackIPInterface>
      <ElementType>LoopbackInterface</ElementType>
      <Name>SoCHostIP1</Name>
      <AttachTo>server2SOC</AttachTo>
      <a:Prefix xmlns:b="Microsoft.Search.Autopilot.NetMux">
        <b:IPPrefix>fe80::0003/128</b:IPPrefix>
      </a:Prefix>
      <a:PrefixStr>fe80::0003/128</a:PrefixStr>
    </a:LoopbackIPInterface>
  </LoopbackIPInterfaces>
</DeviceDataPlaneInfo>

Signed-off-by: Longxiang Lyu lolv@microsoft.com

How I did it

For servers loopback definitions in Dpg, if they contain LoopbackIPInterface with tags AttachTo, which has value of format like <server_name>SOC, the address will be regarded as a SoC IP, and sonic-cfggen now will treat the port connected to the server as active-active if the redundancy_type is either Libra or Mixed.

How to verify it

Pass the unittest.

Which release branch to backport (provide reason below if selected)

• 201811
• 201911
• 202006
• 202012
• 202106
• 202111
• 202205

Description for the changelog

Link to config_db schema for YANG module changes

A picture of a cute animal (not mandatory but encouraged)

[lgtm-com]

This pull request introduces 1 alert when merging 161b624e64a2b24528f0bb4fbe46e920b3b2b819 into 0ae4903 - view on LGTM.com

new alerts:

• 1 for Redundant assignment

[lgtm-com]

This pull request introduces 2 alerts when merging 0245672 into 4fb6cf0 - view on LGTM.com

new alerts:

• 1 for Variable defined multiple times
• 1 for Redundant assignment

[lolyu]

/AzurePipelines run Azure.sonic-buildimage

[azure-pipelines]

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