[INTERNAL][FIX] sap.ui.test.Opa5
[INTERNAL][FIX] sap.ui.test.Opa5

Opa now waits until a teardown is completed before doing stuff to the iframe

Change-Id: Iaf8f54797ba66711d8600003ee07c52704eb2b90

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