ID: 3044436 enhancing extended oscarDB

Changed extended oscarDB so that:
- in case of patient-independent eforms, oscarDB retrieves field data from across patients
- in case of normal eforms, oscarDB retrieves field data only from current eform patient

Change-Id: Iaf17cc6ba58cbca1309315f6523e0f7cb7a85a1a
Merge "ID: 3044436 enhancing extended oscarDB" into RELEASE_12_1