[FIX] sap.uxap.ObjectPageLayout: Corrected calculationn
[FIX] sap.uxap.ObjectPageLayout: Corrected calculationn

Ceiled the obtained scrollableContentLength to overcome
an IE-specific issue when comparing non-integer values.

Change-Id: If3fceaf738c7c4910f560c4fc2d462e6ddaaffc8
BCP: 1880602140

SAP/openui5,SAP/openui5,SAP/openui5,SAP/openui5