[INTERNAL][FIX] sap.m.Panel: Expanded property do not work.

Expanded property do not work if it is set before the expandable property.

Change-Id: Id677ef3693e152f46e776ef19a62da5c081c8412
BCP: 1482016628
Merge "[INTERNAL][FIX] sap.m.Panel: Expanded property do not work."