feat(PowerConnection): Add dashboard to list all connected devices

[Hipska]

Base information

Question	Answer
Related to a SourceForge thread / Another PR / Combodo ticket?	#891
Type of change?	Enhancement

Objective

To be able to see all directly connected devices on the power connection. Currently, only the list of PDUs is presented.

Proposed solution

Replace the PDU list tab with a dashboard that has a list for both PDUs and connected datacenter devices.

A unit test doesn't seem relevant as it's only a datamodel change.

Checklist before requesting a review

• I have performed a self-review of my code
• I have tested all changes I made on an iTop instance
• I have added a unit test, otherwise I have explained why I couldn't
• Is the PR clear and detailed enough so anyone can understand digging in the code?

[Molkobain]

@Hipska we discussed this PR during the last review.

Adding the field and tab on the parent class PowerConnection doesn't seem relevant as it will also be available on the PDU class. We would consider it if you were to add it on the PowerSource class though.

[Hipska]

Why would it not be relevant on the PDU class? Having a list of devices powered by the PDU seems useful to me..

[Molkobain]

Will be discussed with @v-dumas

[Hipska]

Would you also be interested in having a 'impact-analysis'-like view where it shows the relation of which device is powered by which up to the power source? "powered by..." and "powers..." as menu items..

[Hipska]

@Molkobain @v-dumas ?

[Molkobain]

We are currently crunching to release 3.3.0-RC1, I don't think @v-dumas had time to check yet.

[Hipska]

Actually, I was hoping this could have been added in iTop 3.3, the PR was created back in April.