Fixes acquia#1786: Allow PHPCS to use DrupalPractice standard.

Author: grasmash

config/build.yml

@@ -111,6 +111,7 @@ reports:
 
 # @todo Move to subkey of validate.
 phpcs:
+  standard: Drupal,DrupalPractice
   filesets:
     - files.php.custom.modules
     - files.php.tests

src/Robo/Commands/Validate/PhpcsCommand.php

@@ -17,7 +17,7 @@ class PhpcsCommand extends BltTasks {
    * @hook init
    */
   public function initialize() {
-    $this->standard = $this->getConfigValue('repo.root') . '/vendor/drupal/coder/coder_sniffer/Drupal/ruleset.xml';
+    $this->standard = $this->getConfigValue('phpcs.standard');
   }
 
   /**