[INTERNAL] sap.m.UploadCollection: Use _getControl method to create Ok and Cancel button
[INTERNAL] sap.m.UploadCollection: Use _getControl method to create Ok and Cancel button

* In edit mode, Ok and Cancel button are created using _getControl method of UCI

Change-Id: I95f230f3c1ebeeb89e42f5ec4086df3e180e86b6

olirogers/openui5,SQCLabs/openui5,SQCLabs/openui5,SAP/openui5,olirogers/openui5,cschuff/openui5,cschuff/openui5,olirogers/openui5,SAP/openui5,SAP/openui5,nzamani/openui5,SQCLabs/openui5,SAP/openui5,cschuff/openui5,nzamani/openui5,nzamani/openui5