[INTERNAL] sap.m.ComboBox: JSDoc fixes
[INTERNAL] sap.m.ComboBox: JSDoc fixes

JSDoc comments begins with /**

Change-Id: I59cef5516c686676a24402817b82e8a4cf83a535

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