[MNG-6690] Child pom doesn't use the plugin version specified in the parent pom plugin management

**[Rik Schaaf](https://issues.apache.org/jira/secure/ViewProfile.jspa?name=rikschaaf)** opened **[MNG-6690](https://issues.apache.org/jira/browse/MNG-6690?redirect=false)** and commented

I have a parent pom file with the following inside the build tag:

```

...

org.apache.maven.plugins
maven-surefire-plugin
2.22.2

```

And I have a child pom (a direct child) that has the following in the build tag:

```

...

org.apache.maven.plugins
maven-surefire-plugin

```

My expectation is that the build will use version 2.22.2 of the maven surefire plugin.

Instead it runs using version 2.22.1. Only when I explicitly specify the version in the child pom, the build uses version 2.22.2.

I think this is a bug, or at the very least VERY unintuitive behavior.

---

**Affects:** 3.6.0

Reproduce the issue with the parent and child POM snippets, using Maven 3.6.0 and the maven-surefire-plugin. Start by tracing pluginManagement inheritance and plugin-version resolution; done means the child build selects version 2.22.2 without declaring that version in the child POM.

Written by the indexing model from the issue text.