[MNG-7419] Add overiding dependencies from a BOM dependencyManagement

**[zosrothko](https://issues.apache.org/jira/secure/ViewProfile.jspa?name=zosrothko)** opened **[MNG-7419](https://issues.apache.org/jira/browse/MNG-7419?redirect=false)** and commented

Hello

By looking at [MNG-5102](https://issues.apache.org/jira/browse/MNG-5102), I finally manage my BOM problem. But I need an extension that allows the imported BOM to be overriden by some new dependencies specs. As for exemple

```java



com.scort
mi
4.4.0
import
pom


foo
bar
provided

```

The use case is the case where a customer wants to integrate the com.scor:mi jars in a war to run on Tomcat for exemple, while it would like also to integrate com.scort:mi jars as a module of a JBoss server, in which case, the artifacts should be marked as provided.

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No further details from [MNG-7419](https://issues.apache.org/jira/browse/MNG-7419?redirect=false)

Start by reviewing the referenced MNG-5102 behavior and Maven's dependencyManagement handling for imported BOMs. Confirm the desired override semantics from the example, including changing an imported dependency to provided scope; done means the use case is supported and covered by appropriate tests.

Written by the indexing model from the issue text.