do not log config path for default config

Author: mshustov

packages/kbn-test/src/functional_tests/cli/start_servers/args.js

@@ -75,7 +75,8 @@ export function displayHelp() {
 export function processOptions(userOptions, defaultConfigPath) {
   validateOptions(userOptions);
 
-  const config = userOptions.config || defaultConfigPath;
+  const useDefaultConfig = userOptions.config === undefined;
+  const config = useDefaultConfig ? defaultConfigPath : userOptions.config;
 
   if (!config) {
     throw new Error(`functional_tests_server: config is required`);
@@ -100,6 +101,7 @@ export function processOptions(userOptions, defaultConfigPath) {
   return {
     ...userOptions,
     config: resolve(config),
+    useDefaultConfig,
     createLogger,
     extraKbnOpts: userOptions._,
   };

packages/kbn-test/src/functional_tests/tasks.js

@@ -37,10 +37,12 @@ import { readConfigFile } from '../functional_test_runner/lib';
 const makeSuccessMessage = (options) => {
   const installDirFlag = options.installDir ? ` --kibana-install-dir=${options.installDir}` : '';
   const configPaths = Array.isArray(options.config) ? options.config : [options.config];
-  const pathsMessage = configPaths
-    .map((path) => relative(process.cwd(), path))
-    .map((path) => ` --config ${path}`)
-    .join('');
+  const pathsMessage = options.useDefaultConfig
+    ? ''
+    : configPaths
+        .map((path) => relative(process.cwd(), path))
+        .map((path) => ` --config ${path}`)
+        .join('');
 
   return (
     '\n\n' +