feat: Add support for Java product versions defined in properties

[anthonyharrison]

When parsing a Java POM.xml file, some product versions are defined as properties

<properties>
    <junit.jupiter.version>5.8.2</junit.jupiter.version>
</properties>

These then used in the subsequent specification of the product version

<version>${junit.jupiter.version}</version>

Parsing for product versions should support versions defined in this way as this will improve the scanning of the number of Java modules.