EssentialProperties on AdaptationSets not working

[stschr]

Considering the simpliest case, where an AdaptationSet containing one Representation, it sould be irrelevant if an EssentialPropertydescriptor is present on Representation or AdaptationSet level.

With latest released version of dash.js, when setting an EssentialProperty descriptor with a unknown @schemeIdUri on a Representation, this representation gets removed as expected.
However, moving the same descriptor to the parent AdaptationSets will keep this AdaptationSet in the list of available tracks.

• Is objectiron expected to "move" the essentialproperty to the containing Representation?
  OR
• Shall the essentialProperty filtering be applied on AdaptationSets as well?

I can provide a simple demo application if desired
related: #3510

[dsilhavy]

To be honest I was assuming that we already move everything via objectiron. DashConstants.SUPPLEMENTAL_PROPERTY and DashConstants.ESSENTIAL_PROPERTY are part of RepresentationBaseValuesMap. But as you pointed out the values are not moved. It would be cleaner to fix this.

[dsilhavy]

Addressed in #4172