Test rear identify system LEDs of Witherspoon system.

This change includes:
   - Added test cases to turn on/off rear identify LED.
   - Skipped rear identify LED in NA systems.

Resolves openbmc/openbmc-test-automation#755

Change-Id: I1a7376d7815fa0a9ef38e42ec32098a588ecd28f
Signed-off-by: Rahul Maheshwari <rahulmaheshwari@in.ibm.com>
diff --git a/test_lists/skip_test_palmetto b/test_lists/skip_test_palmetto
index f7af86d..e705fff 100644
--- a/test_lists/skip_test_palmetto
+++ b/test_lists/skip_test_palmetto
@@ -52,6 +52,7 @@
 # System LED test cases which are NA for Palmetto system.
 -e Test_Beep_LED_And_Verify_Via_REST
 -e Test_Fault_LED_And_Verify_Via_REST
+-e Test_Rear_Identify_LED_And_Verify_Via_REST
 -e Verify_Enclosure_Fault_LED_On_Assertion
 -e Verify_Rear_Power_LED_Association_With_Group_LED
 # Network tests for xyz interface.