Change "turn on server LED" text

We ran several customers through usability testing of the GUI this
week.
One area that caused confusion is the "Turn on server indicator".
We had a customer think it was a button to power on the server.
Other customers were also confused about what it does.
After discussing and getting customer feedback,
"Turn on server LED" is better understood.
This also matches what is on the Server LED page.

Change-Id: I1b55a377c85ee6e649e27e2a6923b5e17fd23a30
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 4ce9437..d7069ad 100644
--- a/app/overview/controllers/system-overview-controller.html
+++ b/app/overview/controllers/system-overview-controller.html
@@ -89,7 +89,7 @@
 					<p class="inline courier-bold float-right">3:20:12 5/22/2017 UTC</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 indicator</p>
+					<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>
 					<div class="toggle inline float-right">
 						<input id="toggle__switch-round"
 								class="toggle-switch toggle-switch__round-flat"