[FIX] sap.uxap.ObjectPageSubSection - grid data memory leak fixed
[FIX] sap.uxap.ObjectPageSubSection - grid data memory leak fixed

Layout data was not properly removed in all circumastances.

Change-Id: I9397e69cee0d2d3dd3d0e616f489bfd5b4c1c5fc

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