function opaSkip(testName, expected, callback, async) {
		configQUnit();
		var fnTestBody = function () {};
		if (isQUnit2()) {
			QUnit.skip(testName, fnTestBody);
		} else {
			QUnit.skip(testName, expected, fnTestBody, async);
		}
	}
QUnit test adapter for OPA: add a test to be skipped by QUnit
Has the same signature as QUnit.skip (QUnit version is also considered)

@public
@function
@static
@param {string} testName name of the QUnit test.
@param {int} [expected] only supported in QUnit v1.x: denotes how many assertions are expected to be made in the test.
@param {function} callback the test function. Expects 3 arguments, in order:
{@link sap.ui.test.Opa.config}.arrangements, {@link sap.ui.test.Opa.config}.actions, {@link sap.ui.test.Opa.config}.assertions.
These arguments will be prefilled by OPA
@param {boolean} [async=false] available only in QUnit v1.x. Indicates whether the test is asynchronous. False by default.