fix azurerm_nginx_configuration data source test

Now that the NGINXaaS API does not provide a default config, we need to ensure the resource gets created
before referencing the data source, so we don't get config not found errors.

internal/services/nginx/nginx_configuration_data_source_test.go

@@ -22,7 +22,7 @@ func TestAccNginxConfigurationDataSource_basic(t *testing.T) {
 			Config: r.basic(data),
 			Check: acceptance.ComposeTestCheckFunc(
 				check.That(data.ResourceName).Key("root_file").Exists(),
-				check.That(data.ResourceName).Key("config_file").Exists(),
+				check.That(data.ResourceName).Key("config_file.0.content").Exists(),
 			),
 		},
 	})
@@ -34,6 +34,8 @@ func (d NginxConfigurationDataSource) basic(data acceptance.TestData) string {
 
 data "azurerm_nginx_configuration" "test" {
   nginx_deployment_id = azurerm_nginx_deployment.test.id
+
+  depends_on = [azurerm_nginx_configuration.test]
 }
 `, ConfigurationResource{}.basic(data))
 }