xAODPFlow: Missing dictionary.

Need to generate a VectorFactory dictionary for
vector<pair<EL<CaloClusterContainer>, double>>.

See ATEAM-662.

Event/xAOD/xAODPFlow/xAODPFlow/selection.xml

@@ -47,6 +47,7 @@
    <class name="std::pair<ElementLink<xAOD::CaloClusterContainer_v1>,double>" />
    <class name="std::vector<std::pair<ElementLink<xAOD::CaloClusterContainer_v1>,double> >" />
    <class name="std::vector<std::vector<std::pair<ElementLink<xAOD::CaloClusterContainer_v1>,double> > >" />
+   <class name="SG::AuxTypeVectorFactory<std::vector<std::pair<ElementLink<xAOD::CaloClusterContainer_v1>,double> > >" />
    <class name="std::vector<xAOD::PFODetails::PFOLeptonType>" />
 
 </lcgdict>

Event/xAOD/xAODPFlow/xAODPFlow/xAODPFlowDict.h

@@ -47,6 +47,7 @@ namespace {
      std::vector< std::pair< ElementLink< xAOD::CaloClusterContainer >, double > > FlowElemdummy2;
      std::vector< std::vector< std::pair< ElementLink< xAOD::CaloClusterContainer >, double > > > FlowElemdummy3;
      std::vector< xAOD::PFODetails::PFOLeptonType > FlowElemdummy4;
+     SG::AuxTypeVectorFactory<std::vector< std::pair< ElementLink< xAOD::CaloClusterContainer >, double> > > FlowElemdummy5;
      
 
    };