Get the BMC time

Get the BMC time from xyz/openbmc_project/time/bmc.
This time is in epoch time so convert.
Before the time and date hardcoded.
From https://docs.angularjs.org/api/ng/filter/date:
"'medium': equivalent to 'MMM d, y h:mm:ss a' for en_US locale
(e.g. Sep 3, 2010 12:05:08 PM)"
This is a similar format as to what was present on the GUI
before for en_US.
Letting the browser choose the format, is important.
Displayed in user's timezone.

Resolves openbmc/openbmc#3116

Tested: Now see correct date and time, "4/19/2018, 20:31:18 UTC"
Change-Id: Ie30c65b038b58afc8c4c77ca5b70667e80e76cc6
Signed-off-by: Gunnar Mills <gmills@us.ibm.com>
diff --git a/app/overview/controllers/system-overview-controller.html b/app/overview/controllers/system-overview-controller.html
index d7069ad..295aac6 100644
--- a/app/overview/controllers/system-overview-controller.html
+++ b/app/overview/controllers/system-overview-controller.html
@@ -86,7 +86,7 @@
 				</a>
 				<div class="quick-links__item no-icon">
 					<p class="inline quick-links__label">BMC time</p>
-					<p class="inline courier-bold float-right">3:20:12 5/22/2017 UTC</p>
+					<p class="inline courier-bold float-right">{{bmc_time | date:'medium'}}</p>
 				</div>
 				<div class="quick-links__item no-icon">
 					<p class="inline quick-links__label">Turn <span ng-if="dataService.LED_state == 'off'">on</span><span ng-if="dataService.LED_state == 'on'">off</span> server LED</p>