ossindex-maven-plugin has wrong url in pom file

[jakobbraun]

Problem

ossindex-maven-plugin does not define a project URL in the pom file. In that case, maven inherits the value of the parent pom and appends the artifact id (see maven documentation).
By that maven resolves the URL to https://sonatype.github.io/ossindex-maven/ossindex-maven-plugin/, which does not exist.

Suggested Solution

Add an URL tag to maven-plugin/pom.xml