[INTERNAL] GridTable: refreshRowsAdjustRows called when no rows exist
[INTERNAL] GridTable: refreshRowsAdjustRows called when no rows exist

- attach event for refreshRowsAdjustRows timeout only if rows are not
present (e.g. 1st rendering)
- clear timer for refreshRowsAdjustRows when dataReceived event is fired
to avoid late refresh (should not even occur normally due to the 1st
check). This seems to happen in very special conditions as in the BCP

BCP: 1880679734
Change-Id: I0d4b4f9002d21b0cf4e0c0b3917c828bf91f7572

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