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De-duplicate CompositeNode

When the Topo prefilter in B2OC module enabled, Moore test will fail with error messages:

HLTControlFlowMgr                     FATAL in sysInitialize(): exception with tag=buildLines is caught
HLTControlFlowMgr                     ERROR buildLines   node with name Topo_2or3body defined twice.     StatusCode=FAILURE
ServiceManager                        ERROR Unable to initialize Service: HLTControlFlowMgr
ApplicationMgr                        ERROR Application Manager Terminated with error code 1

Seems the CompositeNode created in B2OC module is not automatically de-duplicated.

P.S. The code of Topo prefilter in B2OC module:

def topo_2or3body_node():
    return CompositeNode(
        'Topo_2or3body',
        [make_filtered_topo_twobody(),
         make_filtered_topo_threebody()],
        combineLogic=NodeLogic.NONLAZY_OR)