Cluster details page should list all endpoints

Currently only one endpoint is shown in the cluster details tab.
Instead, this should be a comma-separated list.

Make the appropriate change to the MongoDB and redis templates.

Change-Id: I85c67119174e576134862e7d971b6b9df3f674ac
Closes-bug: #1554623

releasenotes/notes/cluster-endpoints-52bbb9f1c146ae97.yaml

@@ -0,0 +1,4 @@
+---
+fixes:
+  - Display all endpoints in the dashboard's cluster
+    details endpoint list.

trove_dashboard/content/database_clusters/templates/database_clusters/_detail_overview_mongodb.html

@@ -7,13 +7,10 @@
     <dl>
         {% with cluster.ip.0 as ip %}
             <dt>{% trans "Host" %}</dt>
-            <dd>
             {% if not ip %}
-                {% trans "Not Assigned" %}
-            </dd>
+                <dd>{% trans "Not Assigned" %}</dd>
             {% else %}
-                {{ ip }}
-            </dd>
+                <dd>{{ cluster.ip|join:', ' }}</dd>
                 <dt>{% trans "Database Port" %}</dt>
                 <dd>27017</dd>
                 <dt>{% trans "Connection Examples" %}</dt>

trove_dashboard/content/database_clusters/templates/database_clusters/_detail_overview_redis.html

@@ -10,7 +10,7 @@
             {% if not ip %}
                 <dd>{% trans "Not Assigned" %}</dd>
             {% else %}
-                <dd>{{ ip }}</dd>
+                <dd>{{ cluster.ip|join:', ' }}</dd>
                 <dt>{% trans "Connection Examples" %}</dt>
                 <dd>redis-cli -h {{ ip }}</dd>
             {% endif %} <!-- ends else block -->