Support that a Class reference itself with a Compound Identity that declare the self reference as part of the primary key

[andyjefferson]

The log of the test :
10:08:19,171 (main) DEBUG [DataNucleus.Datastore.Schema] - Column "pymodule.name" added to internal representation of table.
10:08:19,171 (main) DEBUG [DataNucleus.Datastore.Schema] - Field [metamicro.jet.core.persistency.modules.PyModule.name] -> Column(s) [pymodule.name] using mapping of type "org.datanucleus.store.mapped.mapping.StringMapping" (org.datanucleus.store.rdbms.mapping.VarCharRDBMSMapping)
10:08:19,171 (main) DEBUG [DataNucleus.Datastore.Schema] - An error occurred while auto-creating schema elements - rolling back
10:08:19,171 (main) ERROR [DataNucleus.SchemaTool] - An exception was thrown during the operation of SchemaTool. Please refer to the log for full details. The following may help : Unsupported relationship with field metamicro.jet.core.persistency.modules.PyModule.parent
Unsupported relationship with field metamicro.jet.core.persistency.modules.PyModule.parent
org.datanucleus.exceptions.NucleusException: Unsupported relationship with field metamicro.jet.core.persistency.modules.PyModule.parent
at org.datanucleus.store.rdbms.table.ClassTable.initializePK(ClassTable.java:1024)
at org.datanucleus.store.rdbms.table.ClassTable.preInitialize(ClassTable.java:252)
at org.datanucleus.store.rdbms.RDBMSManager$ClassAdder.addClassTable(RDBMSManager.java:2563)
at org.datanucleus.store.rdbms.RDBMSManager$ClassAdder.addClassTables(RDBMSManager.java:2354)
at org.datanucleus.store.rdbms.RDBMSManager$ClassAdder.addClassTablesAndValidate(RDBMSManager.java:2625)
at org.datanucleus.store.rdbms.RDBMSManager$ClassAdder.run(RDBMSManager.java:2279)
at org.datanucleus.store.rdbms.AbstractSchemaTransaction.execute(AbstractSchemaTransaction.java:113)
at org.datanucleus.store.rdbms.RDBMSManager.addClasses(RDBMSManager.java:912)
at org.datanucleus.store.rdbms.SchemaTool.createSchema(SchemaTool.java:673)
at org.datanucleus.store.rdbms.SchemaTool.main(SchemaTool.java:289)
jet-core-persistency-modules.jdo.gz