Merge branch 'fix.dh6.memleak' into 'master'

Set token ownership when reading DataHeader_p6 to avoid memory leak

See merge request atlas/athena!26834

Database/PersistentDataModelTPCnv/src/DataHeaderCnv_p6.cxx

@@ -23,6 +23,7 @@ void DataHeaderCnv_p6::persToElem( const DataHeader_p6* pers, unsigned p_idx,
    if( obj_idx != INT32_MIN ) {
       Token* token = new Token;
       trans->m_token = token;
+      trans->m_ownToken = true;
       unsigned db_idx = 0;
       unsigned long long oid2 = 0;
       if( obj_idx >= 0 ) {