Update REST power on in LED test cases

Change-Id: Ib3c1401f311e776a893baade29ffcd28ff384573
Signed-off-by: George Keishing <gkeishin@in.ibm.com>
diff --git a/tests/test_led.robot b/tests/test_led.robot
index 206c4c4..cc1f125 100644
--- a/tests/test_led.robot
+++ b/tests/test_led.robot
@@ -82,7 +82,7 @@
     [Documentation]  Verify power LED state with host power off.
     [Tags]  Verify_Rear_Power_LED_With_Host_Power_Off
 
-    Initiate Host PowerOff
+    REST Power Off
     ${resp}=  Get System LED State  rear_power
     Should Be Equal  ${resp}  Blink
     ${resp}=  Get System LED State  front_power
@@ -93,7 +93,7 @@
     [Documentation]  Verify power LED state with host power on.
     [Tags]  Verify_Rear_Power_LED_With_Host_Power_On
 
-    Initiate Host Boot
+    REST Power On
     ${resp}=  Get System LED State  rear_power
     Should Be Equal  ${resp}  On
     ${resp}=  Get System LED State  front_power