[INTERNAL] Test Starter: Allow to select CSP header via QUnit toolbar
[INTERNAL] Test Starter: Allow to select CSP header via QUnit toolbar

Additionally, a listener is registered for the securitypolicyviolation
event and, when fired, the violation is reported in the context of the
currently running test.

Change-Id: Iae9aabbe2b31a3a89601c320361d1198e5ff4678

SAP/openui5,SAP/openui5,SAP/openui5,SAP/openui5