Link to usage, not dashboard

Organisation team members only have access to the dashboard if they’re
also a member of that service.

They always have access to the usage page, so let’s link there instead.

app/templates/org_nav.html

@@ -1,6 +1,6 @@
 <nav class="navigation">
   <ul>
-  	<li><a href="{{ url_for('.organisation_dashboard', org_id=current_org.id) }}" {{ org_navigation.is_selected('dashboard') }}>Services</a></li>
+  	<li><a href="{{ url_for('.organisation_dashboard', org_id=current_org.id) }}" {{ org_navigation.is_selected('dashboard') }}>Usage</a></li>
     <li><a href="{{ url_for('.manage_org_users', org_id=current_org.id) }}" {{ org_navigation.is_selected('team-members') }}>Team members</a></li>
     {% if current_user.platform_admin %}
     <li><a href="{{ url_for('.organisation_settings', org_id=current_org.id) }}" {{ org_navigation.is_selected('settings') }}>Settings</a></li>

app/templates/views/organisations/organisation/index.html

@@ -1,18 +1,18 @@
 {% extends "org_template.html" %}
 
 {% block org_page_title %}
-  Services
+  Usage
 {% endblock %}
 
 {% block maincolumn_content %}
 
   <h1 class="heading-medium">
-    Services
+    Usage
   </h1>
   <ul>
   {% for service in current_org.live_services %}
     <li class="browse-list-item">
-      <a href="{{ url_for('main.service_dashboard', service_id=service.id) }}" class="browse-list-link">{{ service['name'] }}</a>
+      <a href="{{ url_for('main.usage', service_id=service.id) }}" class="browse-list-link">{{ service['name'] }}</a>
     </li>
   {% endfor %}
   </ul>