CM MOs mapped to the same name are not all loaded when truncation is switched on

[erssebaggala]

Boda-Lite: 0.2.3, 0.0.3-alpha.1, 0.0.3-alpha.2
Operating System: All

When the "Clear tables before loading" option is on, MOs that are mapped to the same table are not all loaded. An example is the ZTE Plan Templates, GGsmRelation and UGsmRelation are loaded into zte_cm.GsmRelation. When loading with the "Clear table before loading" option turned on, only the data of the last file to be loaded will be seen.