TMDM-7460 Can not save ReusableType fields which contains same sub-fields with sibling type
- Retreive field value by name for ReferenceFieldMetadata due to type change
https://jira.talendforge.org/browse/TMDM-7460

Conflicts:
	org.talend.mdm.core/test/com/amalto/core/save/DocumentSaveTest.java