…tled requests

added retry for forceRefresh in case of throttled requests
ran tests
MallocNanoZone=0 go test -race k8s.io/autoscaler/cluster-autoscaler/cloudprovider/azure -- passed

and commented out unit test -- commented out as it takes 10 minutes to complete

func TestCreateAzureManagerWithRetryError(t *testing.T) {
	ctrl := gomock.NewController(t)
	defer ctrl.Finish()
	mockVMClient := mockvmclient.NewMockInterface(ctrl)
	mockVMSSClient := mockvmssclient.NewMockInterface(ctrl)
	mockVMSSClient.EXPECT().List(gomock.Any(), "fakeId").Return([]compute.VirtualMachineScaleSet{}, retry.NewError(true, errors.New("test"))).AnyTimes()
	mockAzClient := &azClient{
		virtualMachinesClient:         mockVMClient,
		virtualMachineScaleSetsClient: mockVMSSClient,
	}
	manager, err := createAzureManagerInternal(strings.NewReader(validAzureCfg), cloudprovider.NodeGroupDiscoveryOptions{}, config.AutoscalingOptions{}, mockAzClient)
	assert.Nil(t, manager)
	assert.NotNil(t, err)
}