WebUI system logs implementation

This commit implements the webui logs page
which will show all system logs depends
on user selection( SEL or Event or Oem). This
is based out of redfish systems log services.
 - View logs with pagination.
 - Search filter for logs view.
 - Sort option with Type, Id, Severity, Date.
 - Clear logs.
 - Export logs.

UnitTest:
 - Existing bmcweb send the system logs of EntryType
   "Event". So Loaded UI, selected Type "Event" and
   validated all the above mentioned operations.

Change-Id: I0384e475f7913ca66b6db5d64831583fb382f8d5
Signed-off-by: AppaRao Puli <apparao.puli@linux.intel.com>
diff --git a/app/index.js b/app/index.js
index c9fed83..3b1089d 100644
--- a/app/index.js
+++ b/app/index.js
@@ -74,6 +74,7 @@
 import inventory_overview_controller from './server-health/controllers/inventory-overview-controller.js';
 import log_controller from './server-health/controllers/log-controller.js';
 import sensors_overview_controller from './server-health/controllers/sensors-overview-controller.js';
+import syslog_controller from './server-health/controllers/syslog-controller.js';
 
 import redfish_index from './redfish/index.js';
 import redfish_controller from './redfish/controllers/redfish-controller.js';