Add signup soon message

Author: jamidwyer

cms/templates/admin/login.html

@@ -35,6 +35,14 @@
 
 <div id="content-main">
 
+{% if user.is_anonymous %}
+<p>
+{% blocktranslate trimmed %}
+    Testing. Signups will open soon!
+{% endblocktranslate %}
+</p>
+{% endif %}
+
 {% if user.is_authenticated %}
 <p class="errornote">
 {% blocktranslate trimmed %}