Merge pull request #9252 from piwik/9247

Fix doubled meta robots tag on login page

plugins/Login/templates/login.twig

 {% extends '@Morpheus/layout.twig' %}
 
+{% block meta %}
+    <meta name="robots" content="index,follow">
+{% endblock %}
+
 {% block head %}
     {{ parent() }}
 
-    {% block meta %}
-        <meta name="robots" content="index,follow">
-    {% endblock %}
-
     <script type="text/javascript" src="libs/bower_components/jquery-placeholder/jquery.placeholder.js"></script>
     <!--[if lt IE 9]>
     <script src="libs/bower_components/html5shiv/dist/html5shiv.min.js"></script>