[INTERNAL] sap.m.Slider (QUnit): removes the registered event listeners
[INTERNAL] sap.m.Slider (QUnit): removes the registered event listeners

Change-Id: Ice9f15e8524962bc4e45e0527c6e0b649c5db065

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