Test LED groups using new xyz interface.

  - Added keywords to Get and Set LEDs state using new
     xyz interface
  - Created testcases to set on and off all different LEDs
     using new xyz interface.
  - Added skip list for Barreleye.
  - Skipped new LED group TCs for NA system i.e. Barreleye
     and Palmetto.

Resolves openbmc/openbmc-test-automation#159

Change-Id: I0cc7a7226a7b2b10c3f326f4071bf192ebd65e70
Signed-off-by: Rahul Maheshwari <rahulmaheshwari@in.ibm.com>
diff --git a/test_lists/skip_test_palmetto b/test_lists/skip_test_palmetto
index 11d0797..e0c2c84 100644
--- a/test_lists/skip_test_palmetto
+++ b/test_lists/skip_test_palmetto
@@ -55,3 +55,5 @@
 -e eSEL_Logging
 #openbmc/openbmc-test-automation/issues/396
 -e NetworkManager
+# Led groups test cases are NA for Barreleye and Palmetto
+-e LED_Group