in test environments, install beta applications

Summary:
Following on from D5938, also need to override the beta setting
so that testApplicationsInstalled passes

Test Plan: testApplicationsInstalled passes

Reviewers: epriestley, nh

Reviewed By: epriestley

CC: aran, Korvin

Differential Revision: https://secure.phabricator.com/D6001

src/infrastructure/testing/PhabricatorTestCase.php

@@ -96,6 +96,9 @@ abstract class PhabricatorTestCase extends ArcanistPhutilTestCase {
     $this->env->overrideEnvConfig(
       'phabricator.uninstalled-applications',
       array());
+    $this->env->overrideEnvConfig(
+      'phabricator.show-beta-applications',
+      true);
 
     // TODO: Remove this when we remove "releeph.installed".
     $this->env->overrideEnvConfig('releeph.installed', true);