lock ajv-keywords to 2.1.1

debian/patches/0430-use-yarn.patch

@@ -1,10 +1,11 @@
 --- a/package.json
 +++ b/package.json
-@@ -13,6 +13,7 @@
+@@ -13,6 +13,8 @@
      "webpack-prod": "NODE_ENV=production webpack --config config/webpack.config.js"
    },
    "dependencies": {
 +    "yarn": "^1.5.1",
++    "ajv-keywords": "2.1.1",
      "autosize": "^4.0.0",
      "axios": "^0.17.1",
      "babel-core": "^6.26.0",

debian/rake-tasks.sh

@@ -30,7 +30,7 @@ chmod 0700 ${gitlab_data_dir}/.gitlab_shell_secret
 
 echo "Installing node modules..."
 runuser -u ${gitlab_user} -- sh -c 'install -d /var/lib/gitlab/node_modules'
-runuser -u ${gitlab_user} -- sh -c 'npm install yarn'
+runuser -u ${gitlab_user} -- sh -c 'npm install yarn ajv-keywords@2.1.1'
 runuser -u ${gitlab_user} -- sh -c 'node_modules/.bin/yarn install'
 
 echo "Precompiling locales..."