[MNG-8081] Profile property activation interpolation

[cstamas]

Property profile activation should interpolate.

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https://issues.apache.org/jira/browse/MNG-8081

[slawekjaranowski]

looks ok

[mbenson]

I notice that this implementation only interpolates properties in property activations, whereas my submitted implementations for both v3.9.x and v4 attempt to satisfy the "least surprise" principle by applying interpolations to all properties among every profile activation type. IMHO that's the best way forward but I am satisfied if this PR becomes the 3.9.x implementation.

[cstamas]

@mbenson can you clarify what you mean by "only [...] property activations" vs "all property activations" as I think don't understand it fully wdym here...

[mbenson]

Sorry @cstamas, was working late and apparently not 100%. Edited my comment with changed text in bold.

Further context: there are system/user/project (in your implementation) properties, and then there are properties of the objects comprising the project model. So an activation has properties whose (string) values may be interpolated from the "environmental" properties. Does that help?

[gnodet]

Duplicates #1447

[jira-importer]

Resolve #10796