Hi kris,
I think that the pom.xml of the jbpm-examples project, has an error in:
<parent>
<groupId>org.jbpm</groupId>
<artifactId>jbpm</artifactId>
<version>5.1.0</version>
</parent>
The correct form is:
<parent>
<groupId>org.jbpm</groupId>
<artifactId>jbpm</artifactId>
<version>5.1.0.Final</version>
</parent>
Hugs
Martini Marcelo (OSDE Company)