[INTERNAL] jQuery.sap.trace: correct overwritten readystatechange of xhr
[INTERNAL] jQuery.sap.trace: correct overwritten readystatechange of xhr

Change-Id: Ia892ce5ff2dd29216185c61d34645cc16ddffcf8
nzamani/openui5,cschuff/openui5,cschuff/openui5,olirogers/openui5,olirogers/openui5,SQCLabs/openui5,SAP/openui5,SQCLabs/openui5,SAP/openui5,nzamani/openui5,nzamani/openui5,SAP/openui5,SQCLabs/openui5,cschuff/openui5,olirogers/openui5,SAP/openui5