NullCollectionsAndIsEmpty does not unset mapped side of relation
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                 Key: JDO-426
                 URL: http://issues.apache.org/jira/browse/JDO-426
             Project: JDO
          Issue Type: Bug
          Components: tck20
    Affects Versions: JDO 2 final
            Reporter: Abe White


org.apache.jdo.tck.query.jdoql.NullCollectionsAndIsEmpty uses its localSetUp() 
method to null the projects of an Employee.  However, the Employee.projects 
field uses mapped-by in its mapping, and per section 15.3 of the JDO 2 spec, 
that means changes to it aren't reflected in the datastore.  To fix, add the 
following lines after retrieving "emp1" but before nulling its projects in 
localSetUp():

        for (Iterator itr = emp1.getProjects().iterator(); itr.hasNext();)
            ((Project) itr.next()).removeMember(emp1);


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