Dependency Management in profiles is not injected when imported from BOM

[Syquel]

Description

In case a BOM is being imported, which contains a profile with a dependencyManagement section, this section is not being injected into the Maven build when flatten-maven-plugin is used and the plugin fails to create the effective POM model.

Example

The BOM org.infinispan:infinispan-bom:13.0.11.Final defines a subset of its dependency management in a separate profile, which is activated by default:

[...]
<profile>
	<id>community-release</id>
	<activation>
		<activeByDefault>true</activeByDefault>
	</activation>
	<dependencyManagement>
		<dependencies>
			<dependency>
				<groupId>org.infinispan</groupId>
				<artifactId>infinispan-marshaller-kryo</artifactId>
				<version>${version.infinispan}</version>
			</dependency>
			<dependency>
				<groupId>org.infinispan</groupId>
				<artifactId>infinispan-marshaller-kryo-bundle</artifactId>
				<version>${version.infinispan}</version>
			</dependency>
			<dependency>
				<groupId>org.infinispan</groupId>
				<artifactId>infinispan-marshaller-protostuff</artifactId>
				<version>${version.infinispan}</version>
			</dependency>
			<dependency>
				<groupId>org.infinispan</groupId>
				<artifactId>infinispan-marshaller-protostuff-bundle</artifactId>
				<version>${version.infinispan}</version>
			</dependency>
		</dependencies>
	</dependencyManagement>
</profile>
[...]

In case a Maven project imports this BOM and declares a dependency on one of these managed dependencies the flatten-maven-plugin fails to build the effective POM model.
Error message: [ERROR] 'dependencies.dependency.version' for org.infinispan:infinispan-marshaller-kryo:jar is missing.

Example project POM:

[...]
<dependencyManagement>
	<dependencies>
		<!-- This BOM contains a profile 'community-release' which is activated by default -->
		<!-- This profile provides dependency management for the artifact 'org.infinispan:infinispan-marshaller-kryo' -->
		<dependency>
			<groupId>org.infinispan</groupId>
			<artifactId>infinispan-bom</artifactId>
			<version>13.0.11.Final</version>
			<type>pom</type>
			<scope>import</scope>
		</dependency>
	</dependencies>
</dependencyManagement>

<dependencies>
	<dependency>
		<groupId>org.infinispan</groupId>
		<artifactId>infinispan-marshaller-kryo</artifactId>
	</dependency>
</dependencies>
[...]