Add SSL Certificate expiration warnings

Adds status icons in data table and alert banners for
expiring and expired certificates.
Warning will be visible within 30 days of certificate
expiration.
Critical/danger indicators will be visible when certificate
is expired.

Signed-off-by: Yoshie Muranaka <yoshiemuranaka@gmail.com>
Change-Id: I6f8c27d4ba1563a79b46eec7b869366ecee42f75
diff --git a/src/views/Overview/OverviewQuickLinks.vue b/src/views/Overview/OverviewQuickLinks.vue
index 9f3ba52..3a0b9cf 100644
--- a/src/views/Overview/OverviewQuickLinks.vue
+++ b/src/views/Overview/OverviewQuickLinks.vue
@@ -3,7 +3,10 @@
     <div>
       <dl>
         <dt>{{ $t('pageOverview.quicklinks.bmcTime') }}</dt>
-        <dd>{{ bmcTime | formatDate }} {{ bmcTime | formatTime }}</dd>
+        <dd v-if="bmcTime">
+          {{ bmcTime | formatDate }} {{ bmcTime | formatTime }}
+        </dd>
+        <dd v-else>--</dd>
       </dl>
     </div>
     <div>