[FIX] TreeTable: Property expandFirstLevel deprecated
[FIX] TreeTable: Property expandFirstLevel deprecated

Corresponding binding parameter numberOfExpandedLevels should be used
instead.

Change-Id: I8f625b2a3691c50bf9925f84f8846558d599304c
BCP: 1780107134

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