OSGi bundle in GracePeriod waiting on javax.persistence.EntityManagerFactory

Issue

Despite a correct JPA configuration, the application bundle is waiting in GracePeriod.

Running a log:display from the karaf command shell shows the following output:

17:52:10,647 | INFO  | NAPSHOT-thread-2 | BlueprintContainerImpl           | 8 - org.apache.aries.blueprint.core - 1.0.1.fuse-71-047 | 
Bundle com.redhat.test is waiting for dependencies [(&(&(!(org.apache.aries.jpa.proxy.factory=*))
(osgi.unit.name=org.jbpm.persistence.jpa))(objectClass=javax.persistence.EntityManagerFactory)), (&(&
(org.apache.aries.jpa.proxy.factory=true)

(osgi.unit.name=org.jbpm.persistence.jpa))(objectClass=javax.persistence.EntityManagerFactory)), (&(&(!(org.apache.aries.jpa.proxy.factory=*))(osgi.unit.name=org.jbpm.persistence.jpa))
(objectClass=javax.persistence.EntityManagerFactory))]