Add Ipoman power consumption support

[Marlinc]

This commit adds support for reading power consumption from Ipoman PDU's.

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Please add test data so we can ensure your change is not broken in the future.

Read the docs to find out how: https://docs.librenms.org/Developing/os/Test-Units

[PipoCanaja]

Hello @Marlinc
Thank you for your contribution ! Will have a look at it more in detail (I am not familiar with this device). But in the meantime, could you have a look at the test documentation above, and contribute it as well ? This will ensure that regression test will successfully run on this device from now on.
Thanx,

[Marlinc]

Hey @PipoCanaja, I have added some SNMP test data, is that what you meant?

[PipoCanaja]

Hey @PipoCanaja, I have added some SNMP test data, is that what you meant?

Hi @Marlinc,

• That's the 1st step of it, yes.
• 2nd step is to run ./scripts/save-test-data.php -o ipoman
  This will generate a json file that should be added as well to the PR.

Bye