Extend Layout for generated provider.spec.js files

[malte2289]

initialize test in a way to access provider and service, e.g.:
var service;
var serviceProvider;

    beforeEach(function() {
        module('module-name');
    });

    beforeEach(function () {
        module(['serviceProvider', function (_serviceProvider) {
            serviceProvider = _serviceProvider; // to use the provider in other parts
        }]);
    });

    beforeEach(function () {
        inject(['service', function (_service) {
            service = _service;    // to use the instance in other parts
        }]);
    });

    it('is provider defined',function()
    {
        expect(serviceProvider).toBeDefined();
    });