[FIX] sap.m.UploadCollection: improved delete function in case of JSON MOdel is used
[FIX] sap.m.UploadCollection: improved delete function in case of JSON
MOdel is used

Change-Id: Ie2ae5eac5f118558dc81820737ed5c7a7516ec37
BCP: 1580039257
cschuff/openui5,SQCLabs/openui5,olirogers/openui5,SAP/openui5,nzamani/openui5,olirogers/openui5,SAP/openui5,cschuff/openui5,cschuff/openui5,olirogers/openui5,nzamani/openui5,nzamani/openui5,SQCLabs/openui5,SAP/openui5,SAP/openui5,SQCLabs/openui5