Add openDCIM to IT Asset Management

[f-dinucci]

Thank you for taking the time to work on a PR for Awesome-Sysadmin!

To ensure your PR is dealt with swiftly please check the following:

• Your additions are Free software
• Software your are submitting is not your own, unless you have a healthy ecosystem with a few contributors (which aren't your sock puppet accounts).
• Submit one item per pull request. This eases reviewing and speeds up inclusion.
• Format your submission as follows, where Demo and Clients are optional.
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  Keep the short description under 80 characters and use sentence case
  for it, even if the project's webpage or readme uses another capitalisation.
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• Additions are inserted preserving alphabetical order.
• Additions are not already listed at awesome-selfhosted
• The Language tag is the main server-side requirement for the software. Don't include frameworks or specific dialects.
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• Any software project you are adding to the list is actively maintained.
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Please take some time to answer the following questions as best you can:

• Why is it awesome?

It's an open source and comprehensive DCIM solution

• Have you used it? For how long?

For some days, still experimenting with it

• Is this in a personal or professional setup?

Professional but as a demo to evaluate adoption

• How many devices/users/services/... do you manage with it?

Still a demo environment

• Biggest pros/cons compared to other solutions?

Can track a lot of details, allow to calculate center of gravity of cabinets

• Any other comments about your use case, things you've found excellent, limitations you've encountered... ?

[nodiscc]

For some days, still experimenting with it

How did it go? Did you stick with this solution in the end?