Remove unwanted dependency to "javax.persistence"

[michael-schnell]

Currently there is a dependency to "javax.persistence" in the project:

<dependency>
    <groupId>org.hibernate.javax.persistence</groupId>
    <artifactId>hibernate-jpa-2.1-api</artifactId>
    <version>1.0.2</version>
</dependency>

This is indirectly introduced by extending the "org.fuin.objects4j.vo.AbstractValueObjectConverter" for "EntityIdPathConverter". This should be avoided by removing this from the "AbstractValueObjectConverter".

[michael-schnell]

No longer exists six years later...