[FIX] jquery.sap.trace: fixed interaction step counter
[FIX] jquery.sap.trace: fixed interaction step counter

- when FESR was activated, the stepcounter counted XHR calls instead of
  interaction steps

Change-Id: I742ff751a6bd9c0cd53eede92919d763441ae644

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